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Michael O'Donovan

Research Officer

Research Interests

Grazing systems
Increasing grass intake of dairy cows, modelling dairy cow grass intake, grass quality as affected by variety and management.
Cull cow fattening strategies

Current Projects

Development of a grass selection index
Increasing the proportion of grazed grass in the dairy cow diet
Strategies of fattening cull dairy cows
Developments in grazing ruminant intake modelling using sward characteristics and measurement methodologies for grass cultivar evaluation.
Precision pasture management: impacts on weed control and implications for biodiversity.

Education

Ph.D. in Animal Science. University College Dublin
Master of Agriculture Science, University College Dublin
Bachelor of Agriculture Science, University College Dublin

Creighton, P., Kennedy, E., Shalloo, L., Boland, T.M. and O'Donovan, M. (2011). A survey analysis of grassland dairy farming in Ireland, investigating grassland management, technology adoption and sward renewal. Grass and Forage Science 66: 251-264 ISSN 0142-5242

Kennedy, E., Curran, J., Mayes, B., McEvoy, M., Murphy, J.P. and O'Donovan, M. (2011). Restricting dairy cow access time to pasture in early lactation: the effects on milk production, grazing behavious and dry matter intake. Animal 5 (11) 1805-1813 ISSN 1751-7311

McEvoy, M., O'Donovan, M. and Shalloo, L. (2011). Development and application of an economic ranking index for perennial ryegrass cultivars. Journal of Dairy Science 94: 1627-1639 ISSN 0022-0302

McEvoy, M., O'Donovan, M. and Shalloo, L. (2011). Capturing the economic benefit of Lolium perenne cultivar performance. Irish Journal of Agricultural & Food Research 50: 83-98 ISSN 0791-6833

O'Donovan, M. , Lewis, E. and O'Kiely, P. (2011). Requirements of future grass-based ruminant production systems in Ireland. Irish Journal of Agricultural & Food Research 50 : 1-21 ISSN 0791-6833

O'Neill, B.F., Deighton, M., O'Loughlin, B., Mulligan, F.J., Boland, T.M., O'Donovan, M. and Lewis, E. (2011). Effects of a perennial ryegrass diet or total mixed ration diet offered to spring-calving Holstein-Friesian dairy cows on methane emissions, dry matter intake, and milk production. Journal of Dairy Science 94:1941-1951 ISSN 0022-0302

Purcell, P.J., O'Brien, M., Boland, T.M., O'Donovan, M. and O'Kiely, P. (2011). Impact of herbage mass and sward allowance of perennial ryegrass sampled throughout the growing season on in vitro rumen methane production. Animal Feed Science and Technology 166-167 : 405-411

Shalloo, L., Creighton, P. and O'Donovan, M. (2011). The economics of reseeding on a dairy farm. Irish Journal of Agricultural & Food Research 50: 113-122 ISSN 0791-6833

Curran, J., Delaby, L., Kennedy, E., Murphy, J.P., Boland, T.M. and O’Donovan, M. (2010). Sward characteristics, grass dry matter intake and milk production performance are affected by pre-grazing herbage mass and pasture allowance. Livestock Science 127 : 144-154 ISSN 1871 1413.

McEvoy, M., Delaby, L., Murphy, J.P., Boland, T.M. and O’Donovan, M. (2010). Effect of herbage mass and allowance on sward characteristics, milk production, intake and rumen volatile fatty acid concentration. Grass and Forage Science 65 : 335-347 ISSN 0142-5242.

Minchin, W., Buckley, F, Kenny, D.A., Monahan, F.J., Shalloo, L. and O’Donovan, M. (2010). An evaluation of over-wintering feeding strategies prior to finishing at pasture for cull dairy cows on live animal performance, carcass and meat quality characteristics. Meat Science 85 : 385-393 ISSN 0309-1740.

Minchin, W., O’Donovan, M., Buckley, F, Kenny, D.A. and Shalloo, L. (2010). Development of a decision support tool to evaluate the financial implications of cull cow finishing under different feeding strategies. Journal of Agricultural Science 148: 433-443 ISSN 0021-8596.

Wims, C., Deighton, M., Lewis, E., O'Loughlin, B., Delaby, L., Boland, T. and O’Donovan, M. (2010). Effect of pregrazing herbage mass on methane production, dry matter intake, and milk production of grazing dairy cows during the mid-season period. Journal of Dairy Science 93: 4976-4985 ISSN 0022-0302.

Hurley, G., Gilliland, T.J. and O'Donovan, M. (2009). Effect of Spring Defoliation Pattern on the Mid-Season Sward Production and Morphology of Perennial Ryegrass Cultivars of Different Maturity. Grass and Forage Science 64: 80-91 ISSN 0142-5242

Kennedy, E., McEvoy, M., Murphy, J.P. and O'Donovan, M. (2009). Effect of restricted access time to pasture on dairy cow milk production grazing behaviour, and dry matter intake. Journal of Dairy Science 92:168-176 ISSN 0022-0302

McEvoy, M., Delaby, L., Kennedy, E., Boland, T.M. and O'Donovan, M. (2009). Early lactation dairy cows: Development of equations to predict intake and milk performance at grazing. Livestock Science 122: 214-221 ISSN 1871-1413

McEvoy, M., O'Donovan, M. , Murphy, J.P., O'Mara, F., Rath, M. and Delaby, L. (2009). Effect of pre grazing herbage mass and daily herbage allowance on the lactation performance of Holstein-Friesian dairy cows. Journal of Dairy Science 92:414-422 ISSN 0022-0302

Minchin, W., Buckley, F, Kenny, D.A., Keane, M.G., Shalloo, L. and O'Donovan, M. (2009). Prediction of cull cow carcass characteristics from live weight and body condition score measured pre slaughter. Irish Journal of Agricultural & Food Research 48:75-86 ISSN 0791-6833

Minchin, W., O'Donovan, M. , Kenny, D.A., Monahan, F.J., Shalloo, L. and Buckley, F (2009). Effect of grass silage and concentrate based finishing strategies on cull dairy cow performance and carcass and meat quality characteristics. Meat Science 81: 93-101 ISSN 0309-1740

Mohammed, R., Stanton, C., Kennelly, J.J., Kramer, J.K.G., Mee, J.F., Glimm, D.R., O'Donovan, M. and Murphy, J.J. (2009). Grazing cows are more efficient than zero-grazed and grass silage fed cows in producing milk rumenic acid. Journal of Dairy Science 92: 3874-3893 ISSN 0022-0302

Palladino, R.A., O'Donovan, M. , Kennedy, E., Murphy, J.J., Boland, T.M. and Kenny, D.A. (2009). Fatty acid composition and nutritive value of twelve cultivars of perennial ryegrass. Grass and Forage Science 64: 219-226 ISSN 0142-5242

Palladino, R.A., O'Donovan, M. , McEvoy, M., Callan, J., Boland, T.M. and Kenny, D.A. (2009). Fatty acid intake and milk fatty acid composition of Holstein dairy cows under different grazing strategies : herbage mass and daily herbage allowance. Journal of Dairy Science 92 : 5212-5223

N. Lopez-Villalobos, D.P. Berry, B. Horan, F. Buckley, J. Kennedy, M. O’Donovan, L. Shalloo, P. Dillon. (2008). Genetics of residual energy intake in Irish Grazing dairy cows. Proceedings of the New Zealand Society of Animal Production 68: 97-101.

Hennessy D., O’Donovan M., French P. and Laidlaw A.S. (2008) Factors influencing tissue turnover during winter in perennial ryegrass dominated swards. Grass and Forage Science 63, 202-211

O’Donovan M., and Delaby, L. (2008). Sward characteristics, grass dry matter intake and milk production performance as affected by timing of spring grazing and subsequent stocking rate. Livestock Science 115 –158-168.

Hennessy D., O’Donovan M., French P.and. Laidlaw A.S (2008) Manipulation of herbage production by altering nitrogen application pattern. Grass and Forage Science 63:152-166

McEvoy, M., Kennedy, E.., Murphy J.P., Boland T.M., Delaby L., and O’Donovan M. (2008). The effect of herbage allowance and concentrate supplementation on milk production performance and dry matter intake of spring calving dairy cows in early lactation. Journal of Dairy Science 91: 1258-1269.

Burke F, O’Donovan M., Murphy JJ. O’Mara FP. and Mulligan F J (2008). The effect of pasture allowance and supplementation with high and low crude protein concentrations on milk production and nitrogen excretion by dairy cows. Livestock Science 114: 325-335.

Hurley G., Gilliland T.J. and O’Donovan M (2008). Relationship between Reproductive Initiation and Ear Emergence Development in Lolium Perenne L. L. Journal of Agricultural Science Cambridge 146, 1-11.

Kennedy E, O’Donovan M., Murphy, J. P. Delaby, L. and O'Mara F. (2008). Effect of herbage allowance and concentrate supplementation on dry matter intake, milk production and energy balance of early lactating dairy cows. Livestock Science 117 (2008) 275-286.

Minchin W. O’Donovan M. Kenny D.A. Monahan F.J. Shalloo L and. Buckley F (208). Effect of grass silage and concentrate based finishing strategies on cull dairy cow performance, carcass and meat quality characteristics. (Meat Science, 81 (2009) 93-101.

Berry. D, Horan B, O’Donovan M., Buckley, F. Kennedy, E. McEvoy, M and Dillon P. (2007). Potentiall to genetically alter intake and energy balance in grass fed dairy cows. J. Dairy Science. (90: 4835-4845)

Burke. F, Murphy J.J. O’Donovan M. O’Mara F.P. Kavanagh, S. and Mulligan, F.J. (2007). Comparative Evaluation of Alternative Forages to Grass Silage in the diet of early lactation cows. J. Dairy Science. 90: 908-917.

Kennedy, E. O’Donovan M. Murphy, J.P. Delaby, L. and O’Mara, F.P. (2007). Effect of Spring grazing date and stocking rate on sward characteristics and dairy cow production during mid lactation. J Dairy Science. 90; 2035-2046.

Kennedy E, O’Donovan M., Murphy, J. P. Delaby, L. and O'Mara F. (2007). Effect of an early-lactation feeding strategy on the lactation performance of spring calving dairy cows. Journal of Dairy Science, 90;3060-3070.

Kennedy E, O’Donovan M., Murphy, J. P. Delaby, L. and O'Mara F. (2006). The effect of initial spring grazing date and subsequent stocking rate on the grazing management, grass dry matter intake and milk production performance of dairy cows in summer. Grass and Forage Science 61: 375-384.

Hennessy D, French P, Laidlaw A.S. O’Donovan M. (2006) The effects of date of final autumn grazing and timing of winter grazing on herbage production in winter and spring. Grass and Forage Science 61: 363-374.

Kennedy E, O’Donovan M., Murphy, J. P. Delaby, L. and O'Mara F. (2005). Effects of grass and concentrate based feeding systems for spring calving dairy cows in early spring on performance during lactation. Grass and Forage Science, 60 (3), 310 -318.

Delagarde, R. and O’Donovan M.. (2005). Les modeles de prevision de l’ingestion journaliere d’herbe et de la production laitiere des vaches au pasturage. INRA Production Animale (2005) 18 (4), 241 -253.

O’ Donovan M and Delaby, L. (2005). A comparison of perennial ryegrass cultivars differing in heading date and grass ploidy for grazing dairy cows at two different stocking rates. Animal Research Vol 54 Number 6 1 -11

O’Donovan M., Delaby, L., Stakelum, G and Dillon, P. (2004). Effect of Autumn/spring nitrogen application date and level on DM production and N efficiency in perennial ryegrass swards. Irish Journal of Agricultural and Food Research. Vol 43, No. 1, (2004).

O’ Donovan, M, Delaby, L., and Peyraud, J.L. (2004). Effect of time of initial grazing date and subsequent stocking rate on pasture production and dairy cow performance. Animal Research Vol 53 Number 6, 1-11

Gowen, N., O’Donovan M.. Casey, I., Rath, M, Delaby, L., and Stakelum, G. (2003). The effect of grass cultivars differing in heading date and ploidy on the performance and dry matter intake of spring calving dairy cows at pasture. Animal Research 52 Vol 4, pp 21-336.

O’Donovan M., Dillon, P., Rath, M., and Stakelum. G. (2002). A comparison of four methods of pasture mass estimation. Irish Journal of Agricultural and Food Research. Vol 41, No 1, 17-29

O’Donovan M., Dillon, P., Rath, M., and Stakelum. G. (2002). A note on the effect of autumn closing date and grass cover at closing on spring grass supply on 10 commercial dairy farms. Irish Journal of Agricultural and Food Research. (Vol 41, No 2,)

O’Donovan, M, Connolly. J., Dillon, P., Rath, M., and Stakelum. G. (2002). The visual assessment of pasture mass. Irish Journal of Agricultural and Food Research (Vol 41, No 2) pp 201-212.

 Other Scientific Publications

Lewis, E., Deighton, M., O'Loughlin, B., O'Neill, B., Wims, C., O'Brien, D., Buckley, F., Shalloo, L. and O'Donovan, M.(2011). Towards reduced methane from grass-based Irish milk production systems. In: Emissionen der Tierhaltung, Kloster Banz, Bad Staffelstein, 06-Dec-2011, 166-177

McParland, S., Banos, G., O'Donovan, M. , Coffey, B., O'Neill, B., Wall, E. and Berry, D.P. (2011). Genetic evaluations for energy balance: a real possibility. In: INTERBULL BULLETON No. 43, Stavanger, Norway, 26-Aug-2011, http://www.interbull.org/index.php

O'Kiely, P., McGeough, E.J., Navarro-Villa, A., Purcell, P.J., O'Brien, Martin, Crosson, P., Moloney, A.P., Boland, T.M., Kenny, D.A., Foley, P.A., Hart, K.J., McEvoy, M., O'Donovan, M. , Grogan, D. and Lopez, S. (2011). Ruminant enteric methanogenesis on forage-based diets. In: 6th International Symposium on non-CO2 Greenhouse Gases/Livestock Research Group Session, Amsterdam, 02-Nov-2011, 1 page Abstract

Beecher, M., Lewis, E., Boland, T., Galvin, N., Fleming, Christine, O'Neill, B. and O'Donovan, M. (2011). Investigation of the relationship between sward organis matter digestibility and sward leaf proportion from 20 years data. (Abstract) Proc. of 8th Intl Symposium on Nutrition of Herbivores 2 (2) : 283

Ganche, E., O'Donovan, M. , Delaby, L., Boland, T. and Kennedy, E. (2011). Post-grazing height in early lactation: immediate and subsequent effects on dairy cow performance and swards characteristics. (Abstract) European Federation of Animal Science 17 : 282

Lewis, E., Coughlan, F., Murphy, J.P., Galvin, N., O'Donovan, M. and O'Neill, B.F. (2011). The effect of supplementing grazed grass with mixed ration on rumen pH and rumen ammonia, volatile fatty acid and lactic acid concentrations. (Abstract) Proc. of 8th Intl Symposium on Nutrition of Herbivores 2 (2) : 284

Lewis, E., Galvin, N., Coughlan, F., Murphy, J.P., O'Donovan, M. and Wims, C. (2011). The effects of sward pre-grazing herbage mass on dairy cow rumen function. (Abstract) Proc. of 8th Intl Symposium on Nutrition of Herbivores 2 (2) : 353

McEvoy, M., O’Donovan, M. and Shalloo, L. (2010). Capturing the economic benefit of Lolium perenne cultivar performance. In: Grasses for the Future Conference, Silver Springs & Moorepark, Co, 14-Oct-2010, 119-138.

O’Donovan, M., Lewis, E., Boland, T. and O'Kiely, P. (2010). Requirements of future grass based ruminant production systems in Ireland. In: Grasses for the Future Conference, Silver Springs and Moorepark,14-Oct-2010, 11-41.

O’Donovan, M. and Van Bysterveldt, A. (2010). Breeding and Management Technologies to Increase Farm Profit:Managing grass through a spring grass deficit - Moorepark Dairy Levy Research Update:Ballydague Research Farm, Series No. 13, 23rd March. Teagasc IE p. 24-28.

Bastiaansen, J.W.M., Bovenhuis, H., Wijga, S., McParland, S., Wall, E., Strandberg, E. and Burns, G.A., Gilliland, T.J., McGilloway, D.A., Lewis, E., O’Donovan, M. and O'Kiely, P. (2010). Variability in composition of grass samples in a national testing system for Lolium perenne L. In: Proceedings of the 23rd General Meeting of the European Grassland Federation, Kiel, Germany, 29-Aug-2010, 15: 479-481.

Creighton, P., Kennedy, E., Gilliland, T.J., Boland, T.M. and O’Donovan, M. (2010). The effect of sward lolium perenne content and defoliation method on seasonal and total dry matter production. (Abstract) Grassland Science in Europe p. 904.

Kennedy, E., Lewis, E., Murphy, J.P. and O’Donovan, M. (2010). Comparison of grazed grass and a TMR diet on early lactation milk production performance. (Abstract) Grassland Science in Europe p. 431-433.

Lewis, E., Coughlan, F., O’Donovan, M. and Wims, C. (2010). The effect of pasture herbage mass on dairy cow runimal pH. (Abstract) Grassland Science in Europe p. 970-972.

O'Connor, P.J., Hennessy, D., O’Donovan, M. and Lynch, B. (2010). The effects of the nitrification inhibitor dicyandiamide (DCD) on herbage production when applied at different times and rates in the autumn and spring. (Abstract) European Grassland Federation 15: 979 981.

Purcell, P., O'Brien, M., Boland, T.M., O’Donovan, M. and O'Kiely, P. (2010). The impact of grazing management on in vitro methane emissions of perennial ryegrass sampled throughout the growing season. (Abstract) Proc of 4th Inter Conf on Greenhouse Gases & Animal Agric p147-148.

O’Donovan, M. and Hennessy, D. (2010). Grasses for the Future - Perennial ryegrass: current and future genetic potential. Teagasc IE p.1-188.

Minchin, W., O’Donovan, M. Kenny, D. Shalloo, L. and Buckley, F. effect of grass silage and concentrate feeding treatments on meat quality characteristics of cull dairy cows. Agricultural Research Forum, Tullamore (2008). P120

Lopez-Villalabos, Berry, D.P. Horan B. Buckley, F. Kennedy, J O’Donovan, M. Shalloo L. and Dillon P. (2008). Genetics of residual intake in Irish grazing dairy cows. New Zealand Society of Animal Production conference Vol 68; 97-100.

McEvoy, M.,O’Donovan, M., Boland, T and Delaby L. Effect of pre-grazing herbage mass on production of dairy cows in mid lactation. Grassland Science in Europe, Vol 13, biodiversity and Animal Feed, pp756-758.

O’Donovan M., O’Loughlin, J., and Kelly, F. Milk production systems to increase competitiveness in regions of high rainfall and heavy clay soil types. Grassland Science in Europe, Vol 13, biodiversity and Animal Feed, pp 840-842.

Palladino, R.A.,O’Donovan, M., Kenny, D.A. and McEvoy, M. Are dairy cow rumen pH levels affected by herbage mass and daily herbage allowance?. Grassland Science in Europe, Vol 13, biodiversity and Animal Feed, pp 843-845.

McEvoy, M.,O’Donovan, M., Delaby L and Boland, T. The effect of variations in herbage mass and daily herbage allowance on milk production of grazing dairy cows. Multi functional grasslands in a changing world XXi international Grassland congress P60

McEvoy, M.,O’Donovan, M., Delaby L and Boland, T. Two techniques to measure herbage intake of grazing dairy cows. Multi functional grasslands in a changing world XXi international Grassland congress P61

Kennedy, E andO’Donovan, M. Effect of restricted access time to pasture on dairy cow milk production, grazing behaviour and dry matter intake. Multi functional grasslands in a changing world XXI international Grassland congress P51

Kennedy, E, O’Donovan, M.and McEvoy M. Effect of winter closing date and spring opening date on the DM yield of perennial ryegrass cultivars. Multi functional grasslands in a changing world XXI international Grassland congress P52

Hurley G., Gilliland T.J. andO’Donovan, M. 2007. Effect of defoliation treatment on the reproductive intiation of perennial ryegrass daughter tillers. EGF, Permanent and Temporary Grassland Plant, Environment and Economy ,Ghent, Vol 12 Grassland Science in Europe p66. 14th Symposium of EGF.

Delagarde, R. and O’Donovan, M. (2005). Modelling of herbage intake and milk production by grazing dairy cows. In ;Utilisation of grazed grass in temperate animal systems, Proceeding of a Satellite Workshop of the XXth International Grassland Congress, Cork, Ireland pp89 - 104.

Kennedy, E. O’Donovan, M.Murphy, J.P. Delaby, L, O'Mara F.P. (2005). The effect of early and delayed spring grazing on the milk production, grazing management and grass intake of dairy cows. In ;Utilisation of grazed grass in temperate animal systems, Proceeding of a Satellite Workshop of the XXth International Grassland Congress, Cork, Ireland pp152.

O’Donovan, M.and Delaby, L. (2004) Effect of time of initial grazing date and subsequent stocking rate on dairy cow performance and pasture production. Proceedings of the EGF 2004 -Land use systems in grassland dominated regions, EGF meeting Lucerne, Vol 9. pp 641-643

O’Donovan, M.Ryan, G. and Stakelum, G (2004). A comparison of three grass based systems of spring milk production incorporating low fixed costs. Proceedings of the EGF 2004 -Land use systems in grassland dominated regions, EGF meeting Lucerne, Vol 9. pp 643 - 646

D Hennessy, D., French, P., O'Donovan M., and Laidlaw, S (2004). Manipulation of grass growth by altering nitrogen application. Proceedings of the EGF 2004 -Land use systems in grassland dominated regions, EGF meeting Lucerne, Vol 9. pp 705 - 707

D Hennessy, D., French, P., O’Donovan, M.and Laidlaw, S (2004). Tissue turnover during the winter in a perennial ryegrass sward. Proceedings of the EGF 2004 -Land use systems in grassland dominated regions, EGF meeting Lucerne, Vol 9. pp 766 – 768

O’Donovan, M., Connolly. J., Dillon, P., Rath, M., and Stakelum. G. (2002). The visual appraisal of pasture mass. European Grassland Federation Journal. 19th EGF Meeting France Vol 7, 460-461

Gowen, N., O’ Donovan M., Casey, I., Stakelum, G., and Rath, M. (2002). Effect of perennial ryegrass cultivar on the milk production performance of rotationally grazed spring calving cows. European Grassland Federation Journal. 19th EGF Meeting France Vol 7, 568-569.

O’Donovan, M., Dillon P., Harrington, D., and Rath, M. (2001). The effect of winter growth on spring grass production. (abstract) Irish Journal of Agricultural and Food Research.

Gowen, N., O’ Donovan M., Casey, I., Stakelum, G., and Rath, M. (2001). Effect of perennial ryegrass cultivar on the milk production performance of rotationally grazed spring calving cows. (abstract) Irish Journal of Agricultural and Food Research.

Murphy, J., Fitzgerald, S., and O’Donovan, M. (2001). The effect of including maize silage in the diet of dairy cows in the close up dry period and at pasture in early lactation. (abstract) Irish Journal of Agricultural and Food Research.

O’Donovan, M. (2000). The relationship between the performance of dairy cows and grassland management on intensive dairy farms in Ireland. Ph.D N.U.I. (University College Dublin).

O’Donovan, M., Dillon, P., Stakelum, G., and Rath, M. (2000) The grazing management practise, feed budgets and herd performance of six spring calving herds over a three year period. Volume 5 Grassland Science in Europe pp 306.

O’Donovan, M., Dillon, P., and Stakelum., G. (2000). The grazing management practice, feed budgets and herd performance of six spring calving herds over a three year period (1996-1998). (abstract) European Grassland Federation Meeting, Denmark.

O’Donovan, M., Dillon P., Crosse, S., and Rath, M. (2000). The effect of late winter/early spring nitrogen application date and rate on different grass covers. (abstract) Irish Journal of Agricultural and Food Research.

O’Donovan, M., Dillon P., Stakelum, G., Harrington, D. and Rath, M. (1999) An evaluation of four different techniques of pasture mass estimation. (abstract) Irish Journal of Agricultural and Food Research.

O’Donovan, M., Dillon P., Stakelum, G., and Rath, M. (1998). Feed budget for spring milk production. (abstract) Irish Journal of Agricultural and Food Research.

O’Donovan, M., Dillon P., Stakelum, G., and Rath, M. (1998). The influence of grazing management on herd productivity of two spring calving herds. (abstract) Irish Journal of Agricultural and Food Research.

O’Donovan, M., Stakelum, G., Dillon, P., Connolly, J. and Rath, M. (1997). The estimation of pasture mass for grazing management. (abstract). Irish Journal of Agricultural and Food Research.

 Technical Publications

Burns, G., Gilliland, T., McGilloway, D., Lewes, E., O’Donovan, M. and O'Kiely, P. (2010). The effect of ploidy on the agronomic performance of periennial ryegrass (Lolium perenne L.). In: Proceedings of the Irish Plant Scientists Association, UCD, Dublin, 02-Jun-2010, Paper 55-1.

Burns, G., Gilliland, T., McGilloway, D., Lewis, E., O’Donovan, M. and O'Kiely, P. (2010). The effect of ploidy on the Agronomic performance of perennial ryegrass (Lolium perenne L). In: Irish Plant Scientist Association Meeting, University College Dublin, 02-Jun-2010, S5-1.

Burns, G.A., Gilliland, T.J., McGilloway, D., O’Donovan, M., Lewis, E., Blount, N. and O'Kiely, P. (2010). Using NIRS to predict composition characteristics of Lolium perenne L. cultivars. In: Proceedings of the British Society of Animal Science and Agricultural Research Forum, Belfast, 13-Apr-2010 p. 321.

Creighton, P., Kennedy, E., Gilliland, T.J., Boland, T. and O’Donovan, M. (2010). The effect of sward perennial ryegrass content and defoliation method on seasonal and total dry matter production. In: Proceedings of the British Society of Animal Science and Agricultural Research Forum, Belfast, 12-Apr-2010, p. 149.

Creighton, P., O’Donovan, M. and Kennedy, E. (2010). Benefits of sward renewal. In: Irish Grassland Association Student Conference, Kildalton College, 04-Oct-2010, p. 19-32.

Deighton, M., Wims, C., O'Loughlin, B., Lewis, E. and O’Donovan, M. (2010). Effect of sward maturity on the dry matter intake, enteric methane emission and milk solids production of pasture grazed dairy cows. In: Proceedings of the British Society of Animal Science and Agricultural Research Forum, Belfast, 13-Apr-2010, p 262.

Kennedy, E., Lewis, E., Murphy, J.P. and O’Donovan, M. (2010). Comparison of grazed grass and a TMR diet on early lactation milk production performance. In: Proceedings of the 23rd General Meeting of the European Grassland Federation, Kiel, Germany, 29-Aug-2010, p. 431.

Lewis, E., Coughlan, F., O’Donovan, M. and Wims, C. (2010). The effect of grazing different pasture herbage masses on rumen pH in lactating dairy cows. In: Proceedings of the British Society of Animal Science and Agricultural Research Forum, Belfast, 13-Apr-2010, p. 293.

McEvoy, M., O’Donovan, M. and Shalloo, L. (2010). Evaluating the economic performance of grass varieties. In: Proceedings of the British Society of Animal Science and Agricultural Research Forum, Belfast, 12-Apr-2010, p. 328.

McEvoy, M., O’Donovan, M., Wims, C. and Kennedy, E. (2010). The effect of evaluation protocol on the dry matter yield performance of Lolium perenne varieties. In: Proceedings of the 23rd General Meeting of the European Grassland Federation,, Kiel, Germany, 29-Aug 2010, 15:314-316.

O'Connor, P.J., Hennessy, D., O’Donovan, M. and Lynch, B. (2010). The effect of the nitrification inhibitor dicyandiamide on herbage production when applied at varying time points and rates in the autumn. In: Proceedings of the British Society of Animal Science and Agricultural Research Forum, Belfast, 13-Apr-2010, p. 318.

O'Neill, B., Deighton, M., O'Loughlin, B., Mulligan, F.J., Boland, T.M., O’Donovan, M. and Lewis, E. (2010). Effects of feeding spring calving dairy cows a perennial ryegrass pasture diet or total mixed ration diet in spring on methane emissions, dry matter intake and milk production. In: A Climate for Change Opportunities for Carbon-Efficient Farming, The Mansion House, 24-Jun-2010, p. 91.

O'Neill, B.F., Deighton, M., O'Loughlin, J., Mulligan, F.J., O’Donovan, M. and Lewis, E. (2010). Evaluation of methane emissions by spring calving Holstein Friesian dairy cows offered a grass-only diet or a total mixed ration. In: Proceedings of the British Society of Animal Science and Agricultural Research Forum, Belfast, 13-Apr-2010, p.77.

Purcell, P., O'Brien, M., Boland, T.M., O’Donovan, M. and O'Kiely, P. (2010). In vitro methane output of perennial ryegrass produced under four grazing management regimes and sampled throughout the growing season. In: Proceedings of the Agricultural Research Forum and the British Society of Animal Science, Belfast, 12-Apr-2010, p260.

Tunon, G., Kennedy, E., Hennessy, D., Kemp, P., Lopez Villalobos, N. and O’Donovan, M. (2010). Dry matter production of perennial ryegrass swards following varying levels of poaching damage on a free-draining earth soil. In: Proceedings of the British Society of Animal Science and Agricultural Research Forum, Belfast, 13-Apr-2010, p. 83.

Wims, C., Boland, T., Delaby, L. and O’Donovan, M. (2010). Effect of concentrate supplementation on milk production of spring calving dairy cows with restricted herbage allowance and subsequent carryover effects. In: Proceedings of the British Society of Animal Science and Agricultural Research Forum, Belfast, 12-Apr-2010, p. 325.

Wims, C., Deighton, M., Lewis, E., O'Loughlin, B., Delaby, L., Boland, T.M. and O’Donovan, M. (2010). Effect of pre-grazing herbage mass on methane production, dry matter intake and milk production of grazing dairy cows during the mid-lactation period. In: A Climate for Change Opportunities for Carbon-Efficient Farming, The Mansion House, 24 Jun-2010, p. 107.

Wims, C., McEvoy, M., Boland, T. and O’Donovan, M. (2010). A comparison between cut and intensively grazed swards on dry matter yield of perennial ryegrass. In: Proceedings of the British Society of Animal Science and Agricultural Research Forum, Belfast, 12-Apr 2010, p. 326.

Wims, C., McEvoy, M., Boland, T. and O’Donovan, M. (2010). A comparison between cut and intensively grazed swards on dry matter yield of perennial ryegrass. In: Proceedings of the 23rd General Meeting of the European Grassland Federation, Kiel, Germany, 29-Aug 2010, 15 : 578.

O’Donovan, M. and Lewis, E. (2010). Mid - season grazing for efficient milk production and reproductive performance - Moorepark Dairy Levy Research Update-Series No. 14 on 6th May. Teagasc IE p. 32-35.

O’Donovan, M., Van Bysterveldt, A., Creighton, P. and Hennessy, D. (2010). Reseeding non productive pasture - a sensible investment - Moorepark Dairy Levy Research Update:Greenfield Site Open Day, Series No. 12 on 19th & 20th January. Teagasc IE p. 41-50.

Lewis, E., O’Donovan, M. and O'Neill, B. (2010). Teagasc-INRA DMI Model Collaboration Trip Report - 15-16 February, 2010. Teagasc-INRA Report 1 1-17.

Creighton, P., Kennedy, E., Shalloo, L., Boland, T. and O'Donovan, M. (2009). A survey analysis of grassland dairy farming in Ireland, and the factors affecting its success at farm level. In: Agricultural Research Forum, Tullamore, 12-Mar-2009, p.76

Curran, J., Delaby, L., Boland, T. and O'Donovan, M. (2009). The effect of pre-grazing herbage mass and daily herbage allowance on dairy cow performance during the main grazing season. In: Agricultural Research Forum, Tullamore, 12-Mar-2009, p.98

Deighton, M., Shalloo, L., O'Brien, D., O'Neill, B., O'Loughlin, J., Lewis, E. and O'Donovan, M. (2009). Grass : a greener alternative. In: National Dairy Conference, Mullingar & Killarney, 18-Nov-2009, p86-92

Hurley, G. and O'Donovan, M. (2009). A study of grass growth rates and milk production performance of dairy farms in Kerry. In: Agricultural Research Forum, Tullamore, 12-Mar-2009

Kennedy, E., Curran, J., Murphy, J.P. and O'Donovan, M. (2009). Overcoming limitations affecting the number of grazing days per year achieved by dairy cows. In: Agricultural Research Forum, Tullamore, 12-Mar-2009, p.94

Lewis, E., Kennedy, E. and O'Donovan, M. (2009). The effect of feeding autumn grass with varying levels of concentrate supplementation compared with a total mixed ration on dairy cow ruminal pH. In: Agricultural Research Forum, Tullamore, 12-Mar-2009, p. 105

Lewis, E., Kennedy, E. and O'Donovan, M. (2009). The effect on dairy cow ruminal pH of feeding autumn grass with varying levels of concentrate supplementation compared to a Total Mixed Ration. In: Agricultural Research Forum, Tullamore, 12-Mar-2009, p.105

McEvoy, M., Delaby, L., Boland, T. and O'Donovan, M. (2009). The effect of variations in herbage mass and daily herbage allowance on sward characteristics, intake and rumen function in dairy cows. In: Agricultural Research Forum, Tullamore, 12-Mar-2009, p.122

McEvoy, M., O'Donovan, M. and Shalloo, L. (2009). Evaluating the economic performance of grass varieties. In: National Dairy Conference, Mullingar & Killarney, 18-Nov-2009, p.79-85

Minchin, W., O'Donovan, M. , Buckley, F, Kenny, D. and Shalloo, L. (2009). An evaluation of the financial implications of different finishing strategies for cull dairy cows. In: Agricultural Research Forum, Tullamore, 12-Mar-2009, p.27

O'Donovan, M. (2009). Grass can we grow and utilise more ?. In: Irish Grassland Association - National Dairy Conference, Silversprings Hotel, Co. Cork, 20-Jan-2009, p.34-48

O'Donovan, M. , Kennedy, E. and McEvoy, M. (2009). Effect of winter closing date and spring opening date on the dry matter yield of perennial ryegrass cultivars. In: Agricultural Research Forum, Tullamore, 12-Mar-2009, p.97

O'Loughlin, J., O'Donovan, M. , Shalloo, L. and Kelly, F. (2009). Grass based milk production systems for regions of high rainfall and heavy clay soil types. In: Agricultural Research Forum, Tullamore, 12-Mar-2009, p.102

Wims, C., Kennedy, E., Boland, T. and O'Donovan, M. (2009). Effect of evaluation protocol and cultivar on the classification of seasonal and total dry matter yield. In: Agricultural Research Forum, Tullamore, 12-Mar-2009, p.136

Kennedy, E. and O'Donovan, M. (2009). On/off grazing : keep cows grazing during wet weather. Irish Dairying New Thinking for Challenging Times (Moorepark Open Day 2009). Teagasc IE pp. 98-100

Kennedy, E., Dillon, P.G., O'Donovan, M. , French, P., Van Bysterveldt, A. and Kennedy, J. (2009). Grazing Notebook. Teagasc IE p. 1-49 ISBN 19122 B3

Kennedy, E., O'Donovan, M. and McEvoy, M. (2009). The Principles and benefits of on/off grazing in Moorepark Dairy Levy Research Update Series No. 10 : Technologies to increase the efficiency of milk production in the BMW region. Teagasc IE p. 19-21

Kennedy, E., O'Donovan, M. and McEvoy, M. (2009). The Principles and Benefits of On/Off Grazing in Moorepark Dairy Levy Research Update on Solohead Open Day Series No. 11 : Using Clover to Cut Costs on Dairy and Beef Farms. Teagasc IE p.21-23

O'Donovan, M. and Kennedy, E. (2009). Increasing the role of grass this spring in Moorepark Dairy Levy Research Update Series No. 10 : Technologies to increase the efficiency of milk production in the BMW region. Teagasc IE p. 22-25

O'Donovan, M. and Kennedy, E. (2009). Increasing the Role of Grass this Spring in Moorepark Dairy Levy Research Update on Solohead Open Day Series No. 11 : Using Clover to Cut Costs on Dairy and Beef Farms. Teagasc IE p.24-27

O'Donovan, M. and Kennedy, E. (2009). Pasture to profit - using key technologies - Irish Dairying New Thinking for Challenging Times (Moorepark Open Day 2009). Teagasc IE 15-21.

Kennedy, E and O’Donovan M. 2008 Restricting Access time to pasture – its effects on dairy cow milk production, grazing behaviour and dry matter intake. Agricultural Research Forum, Tullamore P29

Patton, J., Olmos, G. O’Donovan, M. and Murphy, J.J. 2008 Comparison of total mixed ration and pasture feeding systems for early lactation dairy cows. Agricultural Research Forum, Tullamore P30

Minchin, W., O’Donovan, M. Kenny, D. Shalloo, L. and Buckley, F. 2008 An evaluation of four over-wintering strategies prior to finishing at pasture on physical and carcass characteristics for cull dairy cows. Agricultural Research Forum, Tullamore - P32

Hurley G., Gilliland T.J. and O’Donovan M. 2008 Effect of defoliation treatment on the reproductive intiation of perennial ryegrass daughter tillers. Agricultural Research Forum, Tullamore. P74

McEvoy, M., O’Donovan M., Delaby L and Boland, T. 2007 The effect of variations in herbage mass and daily herbage allowance on milk production of grazing dairy cows. Agricultural Research Forum, Tullamore - P76

O’Donovan, M., Kennedy, E., and McEvoy, M. 2007 Effect of winter closing date and spring opening date on the DM yield of perennial ryegrass cultivars. Agricultural Research Forum, Tullamore - P102.

Palladino, R.A. Kennedy, E., O’Donovan, M., Murphy, J.J., Boland, T. and Kenny, D. 2007 Effect of harvest date on the fatty acid composition of different perennial ryegrass cultivars. Agricultural Research Forum, Tullamore -. P105.

Palladino, R.A. O’Donovan, M., Kenny, D and McEvoy, M. 2007 Effect of herbage mass and daily herbage allowance on rumen pH in dairy cows grazing ryegrass. Agricultural Research Forum, Tullamore- P106.

Curran, J. Kennedy, E. Boland, T and O’Donovan M. 2007 Hybrid ryegrass, potential for spring grazing systems. Agricultural Research Forum, Tullamore - P107.

O’Loughlin, J. O’Donovan, M.,and Kelly, F. 2007 Grass based milk production systems for regions of high rainfall and heavy clay soil types. Agricultural Research Forum, Tullamore -P108.

Murphy, J.J. Patton, J. Kavanagh, S., Maher and O’Donovan M. 2007. Associations between pasture quality and mid season milk protein concentration in commercial dairy herds in Ireland. Agricultural Research Forum, Tullamore P109.

McEvoy, M., O’Donovan M., Delaby L and Boland, T. 2007. Factors influencing dairy cow performance in early lactation. Agricultural Research Forum, Tullamore - P121

McEvoy, M., O’Donovan M., Murphy J.P. O’Mara F., Rath M, and Delaby L. 2007 Effect of concentrate supplementation and herbage allowance on milk production performance of spring calving dairy cows in early lactation. Agricultural Research Forum, Tullamore p46

Minchin W., O’Donovan M., Kenny, D. Monahan F.J. Shalloo L, and Buckley F. 2007 Finishing strategies for cull dairy cows. Agricultural Research Forum, Tullamore P47

O’Donovan M., O’Loughlin J and Kelly F. Milk production systems to increase competitiveness in regions of high rainfall and heavy clay soil types. Agricultural Research Forum, Tullamore (2007) P56

Hurley G., Gilliland T.J. and O’Donovan M. The influence of latitude and growing conditions on reproductive initiation and ear emergence development in perennial ryegrass. Agricultural Research Forum, Tullamore (2007) P65

Kennedy, E., O’Donovan M. Delaby L., and O’Mare F. Hybrid ryegrass-its role in early spring grazing systems. Agricultural Research Forum, Tullamore (2007) P67

Minchin W., O’Donovan M., Kenny, D. Shalloo L, and Buckley F. An evaluation of the most economic fattening strategies for cull dairy cows. Agricultural Research Forum, Tullamore (2007) P87

Hennessy, D., O’Donovan M., French, P and Laidlaw S. Altering fertiliser nitrogen application pattern; effect on tiller turnover during spring and summer. Agricultural Research Forum, Tullamore (2007) P105

McEvoy, M., O’Donovan M., Murphy J.P. O’Mara F., Rath M, and Delaby L. Comparison of two techniques to estimate herbage intake of grazing dairy cows. Agricultural Research Forum, Tullamore (2007) P110

Minchin W., O’Donovan M., Kenny, D. Shalloo L, and Buckley F. Forage and concentrate based finishing strategies for cull dairy cows. BGS Spring 2007

Berry. D, Horan B, O’Donovan, M., Buckley, F. Kennedy, E. McEvoy, M and Dillon P. (2007). Potentiall to genetically alter intake and energy balance in grass fed dairy cows. EAAP, Dublin 26-29 August, Book of Abstract No 13 (2007) Dublin p4.

Minchin W., O’Donovan M., Kenny, D. Shalloo L, and Buckley F. Forage and concentrate based finishing strategies for cull dairy cows. EAAP, Dublin 26-29 August, Book of Abstract No 13 (2007) Dublin p109.

Kennedy E, O’Donovan, M.,, Murphy, J. P. Delaby, L. and O'Mara F. (2007). Effect of daily herbage allowance and concentrate supplementation offered to spring calving dairy cows in early lactation. EAAP, Dublin 26-29 August, Book of Abstract No 13 (2007) Dublin p296.

Hurley G., Gilliland T.J. and O’Donovan M. 2007 Effect of perennial ryegrass cultivar maturity and defoliation pattern on sward nutritive composition. EAAP, Dublin 26-29 August, Book of Abstract No 13 (2007) Dublin p297.

Hurley G., Gilliland T.J. and O’Donovan M. 2007 Effect of defoliation treatment on the reproductive intiation of perennial ryegrass daughter tillers. EGF, Permanent and Temporary Grassland Plant, Environment and Economy ,Ghent, Book of Abstract p5. 14th Symposium of EGF.

Hurley G., Gilliland T.J. and O’Donovan M. 2007 Evaluation of the meteorological factors influencing reproductive initiation and ear emergence of perennial ryegrass cultivars. EGF, Permanent and Temporary Grassland Plant, Environment and Economy ,Ghent, Book of Abstract p29. 14th Symposium of EGF.

Kennedy E, O’Donovan, M., and O'Mara F. (2007). Effect of initial spring grazing date and stocking rate on sward composition, milk production and grazing behaviour. EGF, Permanent and Temporary Grassland Plant, Environment and Economy ,Ghent, Book of Abstract p34. 14th Symposium of EGF.

McEvoy, M., O’Donovan M., Murphy J.P. O’Mara F., Rath M, and Delaby L. 2007 Effect of daily herbage allowance and concentrate level on dry matter intake and milk performance of spring calving dairy cows in early lactation. EAAP, Dublin 26-29 August, Book of Abstract No 13 (2007) Dublin p296.

McEvoy, M., O’Donovan M., O’Mara F. and Rath M. 2007 Effect of concentrate level and daily herbage allowance on performance of dairy cows in spring. EGF, Permanent and Temporary Grassland Plant, Environment and Economy ,Ghent, Book of Abstract p40. 14th Symposium of EGF.

O’Donovan, M, Kennedy, E and Horan, B. (2007). Profitable grazing management practices. Proceedings of Irish Grassland Conference, Silversprings Cork January 2007.

Cromie, A. Keady, T. and O’Donovan M. (2006) Achievement of research in the areas of pasture and forage. In; Animal Production and Animal Science Worldwide. WAAP book of the year 2006 p107-114 (ed. A Rosati, A Tewolde and C Mosconi).

E. Kennedy, O’Donovan, M.,, J.P. Murphy, L. Delaby and F.P. O’Mara (2006). The effect of early lactation feeding system on subsequent mid-lactation milk production performance. BGS Conference September 2006 p.31-32 (Oral Presentation)

E Kennedy, O’Donovan, M.,, M Rath, F O’Mara and L Delaby (2006). Effect of daily herbage allowance and concentrate level on the milk production performance of spring calving dairy cows in early lactation. ADSA/ASAS Conference, Minnesota July 2006 p. 454/455 (Oral Presentation)

E Kennedy, O’Donovan, M.,, JP Murphy, F O’Mara and L Delaby (2006). Effect of spring grazing date and subsequent stocking rate on dairy cow performance in the mid grazing season. ADSA/ASAS Conference, Minnesota July 2006 p. 322 (Poster)

O’Donovan, M.,, E. Kennedy, T. Guinee and J. J. Murphy. (2006) Effects of offering different types of supplementation to spring calving dairy cows at grass in autumn. ADSA/ASAS Conference, Minnesota July 2006 p.455 (Oral)

E. Kennedy, O’Donovan, M.,, L. Delaby, F. P. O'Mara (2006) Investigating the contribution of hybrid ryegrass to early spring grazing systems. In: Sustainable Grassland Productivity EGF General Meeting, 3-6 April 2006, Badajoz, Spain. pp. 50 - 52 (Presentation)

E. Kennedy, O’Donovan, M.,, J.P. Murphy, M. Rath, F. O'Mara, L. Delaby (2006) Effect of daily herbage allowance and concentrate inclusion on the milk production of spring calving dairy cows in early lactation. Proceedings of the Agricultural Research Forum, Tullamore, Ireland p. 73 (Oral)

E. Kennedy, O’Donovan, M.,, M. Rath, F. O'Mara, L. Delaby (2006) Investigating the contribution of hybrid ryegrass to early spring grazing systems. Proceedings of the Agricultural Research Forum, Tullamore, Ireland p. 115 (Poster)

Kennedy E, O’Donovan, M.,urphy J.P Rath, M. O’Mara F and Delaby L (2006). Investigating the contribution of hybrid ryegrass to early spring grazing systems. Proceedings of the EGF 2006 –Sustainable grassland productivity, EGF meeting Badajoz Spain, Vol 11. pp 50 -52.

Hurley, G. Gililand T, O’Donovan, M., (2006). Quantification of the initiation date, heading date and critical day length of ryegrass cultivars. Proceedings of the EGF 2006 –Sustainable grassland productivity, EGF meeting Badajoz Spain, Vol 11. pp 182 - 184

Burke F, O’Donovan, M.,, Murphy JJ O’Mara FP and Mulligan FJ (2006). The effect of supplementary crude protein concentration on the performance of grazing dairy cows. Proceedings of the EGF 2006 –Sustainable grassland productivity, EGF meeting Badajoz Spain, Vol 11. pp 188 – 190

Kennedy E, O’Donovan, M.,, Rath, M. O’Mara F and Delaby L (2006) Effect of daily herbage allowance and concentrate level on the milk production performance of spring calving dairy cows in early lactation. ASDA meeting.

Kennedy E, O’Donovan, M.,, Rath, M. O’Mara F and Delaby L (2006) Effect of spring grazing date and subsequent stocking rate on dairy cow performance in the mid grazing season. ASDA meeting.

O’Donovan, M., Kennedy, E. Guinea, T. and Murphy, J. (2006). Effects of offering different types of supplementation to spring calving dairy cows at grass in autumn. ASDA meeting.

Burke F, O’Donovan, M.,, Murphy JJ O’Mara FP and Mulligan FJ (2006).

Effects of offering high and low crude protein concentrate supplements and forage to grazing cows in spring. Proceedings of the Irish Grassland and Animal Production Association 32nd Annual Research Meeting - Agricultural Research Forum – Tullamore pp13

Hurley, G, O’Donovan, M.,, Gilliland T (2006). The effects of grass genotype and spring management on the morphology and inflorescence development of mid summer ryegrass swards. Proceedings of the Irish Grassland and Animal Production Association 32nd Annual Research Meeting - Agricultural Research Forum – Tullamore pp45

Kennedy E, O’Donovan, M.,urphy J.P Rath, M. O’Mara F and Delaby L (2006). Effects of daily herbage allowance and concentrate inclusion on the milk production of spring calving dairy cows in early lactation. Proceedings of the Irish Grassland and Animal Production Association 32nd Annual Research Meeting - Agricultural Research Forum – Tullamore pp73

Burke F, O’Donovan, M.,, Murphy JJ O’Mara FP and Mulligan FJ (2006).

Comparative evaluation of conserved grass, fermented whole crop wheat, urea ttreated processed whole crop wheat and maize silage in the diet of early lactation dairy cows. Proceedings of the Irish Grassland and Animal Production Association 32nd Annual Research Meeting - Agricultural Research Forum – Tullamore pp112

Hurley, G, O’Donovan, M.,, Gilliland T (2006). Quantification of the initiation date, heading date and critical day length of ryegrass cultivars. Proceedings of the Irish Grassland and Animal Production Association 32nd Annual Research Meeting - Agricultural Research Forum – Tullamore pp113

D Hennessy, O’Donovan, M.,, French, P. and Laidlaw, S (2006). Effects of closing date and grazing date on lolium perenne tiller density. Proceedings of the Irish Grassland and Animal Production Association 32nd Annual Research Meeting - Agricultural Research Forum – Tullamore pp114

Kennedy E, O’Donovan, M.,, Rath, M. O’Mara F and Delaby L (2006). Investigating the contribution of hybrid ryegrass to early spring grazing systems. Proceedings of the Irish Grassland and Animal Production Association 32nd Annual Research Meeting - Agricultural Research Forum – Tullamore pp115

Mohammed, R., O’Donovan, M.,, Staunton C.S. Kennelly J,J, Mee J.F. and Murphy JJ. (2006). Effect of different forms of feeding grass on intakes, milk yield and composition of spring calving dairy cows in early lactation. Proceedings of the Irish Grassland and Animal Production Association 32nd Annual Research Meeting - Agricultural Research Forum – Tullamore pp116

O’Donovan and Kennedy E (2006) Early spring grazing management. Moorepark Dairy Levy Research Update pp 21 -26

O’Donovan and Hennessy D (2006) Grazing strategies in wet conditions. Moorepark Dairy Levy Research Update pp 34.

O’Loughlin J and O’Donovan, M.,(2006) Increasing the competitiveness of milk production in areas with high rainfall and heavy clay soils. Moorepark Dairy Levy Research Update pp 37.

O’Donovan, M.,and Kennedy E (2006) Early spring grazing management. Moorepark Dairy Levy Research Update (Alternative options for dairying) pp 14.

O’Donovan, M., Hurley, G. Delaby, and Stakelum, G. (2005). A comparison of perennial ryegrass cultivars differing in heading date and grass ploidy for grazing dairy cows at two different stocking rates. In ;Utilisation of grazed grass in temperate animal systems, Proceeding of a Satellite Workshop of the XXth International Grassland Congress, Cork, Ireland pp165.

Olsson, V. Murphy, J.J. O'Mara, F.P. O’Donovan, M., and Mulligan, F.J. (2005). In situ rumen degradability of perennial ryegrass cultivars differing in ploidy and heading date in Ireland. In ;Utilisation of grazed grass in temperate animal systems, Proceeding of a Satellite Workshop of the XXth International Grassland Congress, Cork, Ireland pp166.

Hennessy, D. Laidlaw, S. O’Donovan, M., and French, P. (2005). Modelling winter growth and senescence. In ;Utilisation of grazed grass in temperate animal systems, Proceeding of a Satellite Workshop of the XXth International Grassland Congress, Cork, Ireland pp197.

Defranc, P. Delaby, L. Seuret, J.M. and O’Donovan, M., (2005). Effect of strategy of forage supplementation and of turnout date in a medium stocking rate system on the main characteristics of dairy cows grazing. In ;Utilisation of grazed grass in temperate animal systems, Proceeding of a Satellite Workshop of the XXth International Grassland Congress, Cork, Ireland pp215.

O’Donovan, M., Defranc, P. and Delaby, L. (2005). Effect of farm grass cover at turnout on the grazing management of spring calving dairy cows. In ;Utilisation of grazed grass in temperate animal systems, Proceeding of a Satellite Workshop ot the XXth International Grassland Congress, Cork, Ireland pp232.

O’Donovan, M., Kennedy, E. Guinee, T. and Murphy, J. (2005). What supplementation type for spring calving dairy cows at grass in Autumn ?. In ;Utilisation of grazed grass in temperate animal systems, Proceeding of a Satellite Workshop ot the XXth International Grassland Congress, Cork, Ireland pp233.

Hennessy, D. Laidlaw, S. O’Donovan, M., and French, P. (2005). Modelling winter growth and senescence. In ; Proceeding of the XXth International Grassland Congress, Dublin, Ireland pp872.

Kennedy, E. O’Donovan, M., Murphy, J.P. Delaby, L, O'Mara F.P. (2005). The effects of a high grass input feeding system compared to high concentrate input feeding system offered to spring calving dairy cows in early lactation. In ; Proceeding of the XXth International Grassland Congress, Dublin, Ireland pp164.

D Hennessy, O’Donovan, M.,, French, P. and Laidlaw, S (2005). Incresing the quantity of grazed grass in the diet of a spring calving dairy herd stocked at 2 LU ha. Proceedings of the Irish Grassland and Animal Production Association 31st Annual Research Meeting - Agricultural Research Forum – Tullamore pp111

E Kennedy, O’Donovan, M., J P Murphy, L Delaby and F P O'Mara (2005). The effect of initial spring grazing date on the milk production and grass dry matter intake of spring calving dairy cows. Proceedings of the Irish Grassland and Animal Production Association 31st Annual Research Meeting - Agricultural Research Forum – Tullamore pp90

E Kennedy, O’Donovan, M., J P Murphy, L Delaby and F P O'Mara (2005). The effects of a high daily herbage allowance and low concentrate level compared to a high concentrate level in a TMR feeding system offered to spring calving dairy cows in early lactation. Proceedings of the Irish Grassland and Animal Production Association 31st Annual Research Meeting - Agricultural Research Forum – Tullamore pp40

V Olsson, JJ Murphy, F P O'Mara, O’Donovan, M., F J Mulligan (2005). Irish PDI values of perennial ryegrass cultivars differing in heading date and ploidy. Proceedings of the Irish Grassland and Animal Production Association 31st Annual Research Meeting - Agricultural Research Forum – Tullamore pp20

D Hennessy, French, P. O’Donovan, M., and Laidlaw, S. (2004) The effect of altering nitrogen application pattern on the grass growth curve. Proceedings of the Irish Grassland and Animal Production Association 30th Annual Research Meeting - Agricultural Research Forum – Tullamore pp45

D Hennessy, French, P. O’Donovan, M., and Laidlaw, S (2004). Effect of closing date and grazing date on winter DM yield and subsequent DM production. Proceedings of the Irish Grassland and Animal Production Association 30th Annual Research Meeting - Agricultural Research Forum – Tullamore pp89

O’Donovan, M., Stakelum G, and Delaby L (2004). A comparison of perennial ryegrass cultivars differing in heading date and grass ploidy for grazing dairy cows at two different stocking rates. Proceedings of the Irish Grassland and Animal Production Association 30th Annual Research Meeting - Agricultural Research Forum – Tullamore pp46

Delaby, L. O’Donovan, M., and Peyraud, J L. (2004) Effect of time of initial grazing date and subsequent stocking rate on dairy cow performance and pasture production. Proceedings of the Irish Grassland and Animal Production Association 30th Annual Research Meeting - Agricultural Research Forum – Tullamore pp47

D Hennessy, French, P. O’Donovan, M., and Laidlaw, S. 2003. Effect of closing date on leaf extension rate and leaf appearance rate. Proceedings of the Irish Grassland and Animal Production Association 29th Annual Research Meeting - Agricultural Research Forum – Tullamore pp22.

French, P. and O’Donovan, M. (2002) Winter grazing of autumn grown grass at two sites; effect of closing date and grazing date. Proceedings of the Irish Grassland and Animal Production Association 28th Annual Research Meeting - Agricultural Research Forum – Tullamore

Gowen, N., Casey, I., O’Donovan, M., Stakelum, G., and Rath, M. (2002) Effect of perennial ryegrass cultivar and grazing severity on sward characteristics and chemical composition. Proceedings of the Irish Grassland and Animal Production Association 28th Annual Research Meeting - Agricultural Research Forum – Tullamore

O’Donovan M., Ryan, G., and Meaney, B. (2002) A comparison of three spring milk production systems based on low fixed cost structures. Proceedings of the Irish Grassland and Animal Production Association 28th Annual Research Meeting - Agricultural Research Forum – Tullamore.

O’Donovan, M. (2001). The influence of grass cultivars on milk production. Teagasc End of project report 4572.

O’Donovan, M., Ryan, G., Meaney, B, and Mee, J. (2001). A comparison of three systems of spring milk production incorporating low fixed costs. End of project report 4630.

Stakelum, G, and O’Donovan, M. (2000). Grass utilisation and grazing management for dairying. In ; Dairying 2000 – Opportunities for the new millennium. Teagasc National dairy conference 2000.

O’Donovan, M.,., Dillon P., Harrington, D., and Rath, M. (2000). The effect of winter growth on spring grass production. AGMET National Conference, Dublin March 2000.

O’Donovan, M.,., Dillon P.,Stakelum, G., Gowen, N., and Rath, M. (2000). The feed budgets and herd performance of six spring calving dairy herds over a two year period (1997-1998). In Grazing Management, Occasional Symposium No.34 Editors: A.J. Rook and P.D. Penning.

Anglesey, D, and O’Donovan, M. (2000). Improving milk solids. Proceedings Irish Grassland and Animal Production Association Dairy Conference, Limerick

O’Donovan, M.,., Dillon, P., and Stakelum., G. (2000). The effect of late winter/early spring nitrogen application date and rate on different grass covers. (abstract) 26th Irish Grassland and Animal Production Meeting, pp 207-208.

Dillon, P., Ryan, G., and O’Donovan, M. (1999). Increasing output from grassland future challenges. In: National Dairy Conference, Dairying in the new Millennium.

Leonard, S and O’Donovan, M. (1999). Improving cow performance from increased use of grazed grass. Proceedings Irish Grassland and Animal Production Association Dairy Conference, Limerick

O’Donovan, M.,., Dillon P., Stakelum, G., Harrington, D. and Rath, M. (1999) An evaluation of four different techniques of pasture mass estimation. Proceedings of the Irish Grassland and Animal Production Association 24rd Annual Research Meeting - Agricultural Research Forum - University College Dublin.

O’Donovan, M.,., Dillon P. (1999). Measurement of grassland management practise on commercial dairy farms, Teagasc End of project report 4351.

O’Donovan, M., Dillon, P., Stakelum, G. (1998). Spring grassland management - using the proper measurements. Farm & Food Autumn/Winter (1998).

O’Donovan, M., Dillon, P., Stakelum, G. (1998). Grassland management - effect on herd performance. Proceedings Irish Grassland and Animal Production Association Dairy Conference, Limerick, 17th April 1998

Stakelum, G. and O’Donovan, M. (1998). Grazing severity, sward digestibility and intake, and farm cover targets for profitable summer milk production. Proceedings of Conference on “The production of high quality milk from grass and other feeds”, Irish Grain & Feed Association and Teagasc, Dairy Production Department, Moorepark Conference. Cahir House Hotel, Cahir, Co. Tipperary. Thursday, 23rd April, 1998. (pp.1-16)

O’Donovan, M., Dillon, P., Stakelum, G. and Rath, M. (1998). Moorepark model for Spring milk production. Poster : Irish Grassland and Animal Production Association, Agricultural Research Forum, University College Dublin, 19th and 20th March, 1998.

O’Donovan, M., Dillon, P., Stakelum, G. and Rath, M. (1998). The influence of grazing management on herd productivity of two spring calving herds. Poster : Irish Grassland and Animal Production Association, Agricultural Research Forum, University College Dublin, 19th and 20th March, 1998.

O’Donovan, M. (1998). Editor/Author of Booklet “Grassland Measurement” - Benefits and Guidelines. pp.1-24. 12th October, 1998. Teagasc-IFI.

O’Donovan, M., Dillon, P., Stakelum, G. and Crosse, S. (1997). Using pasture measurements to monitor performance on intensive dairy farms. Proceedings Irish Grassland and Animal Production Association Dairy Conference, Limerick, 11th April 1997.

Stakelum, G., O’Donovan, M.,. and Maher, J. (1997). Simplified grazing management for high performance from the cows. Teagasc - National Dairy Conference ‘Technology for Profitable Farming’ pp 33-53.

O’Donovan, M.,., Stakelum, G., Dillon, P., Connolly, J, and Rath, M. (1997). The estimation of pasture mass for grazing management. Proceedings of the Irish Grassland and Animal Production Association 23rd Annual Research Meeting - Agricultural Research Forum - University College Dublin, 3-4th April, 1997, pp.317-318.

 Practical/Popular Publications

O’Donovan, M., Kennedy, E. and Lewis, E. (2010). Grass is still in short supply – Moorepark update. Irish Farmers Journal 8/4/10.

O’Donovan, M., Kennedy, E. and Lewis, E. (2010). Managing Cows through a Spring Grass Shortage. Irish Farmers Journal 4/3/10.

O’Donovan M and Hurley G. 2007 Is changing your pasture worthwhile ?. Irish Independent April 2007

O’Donovan M and Hurley G. 2007 Is it worth reseeding !. Irish Independent July 2007

O’Donovan M and Hurley G. 2006 Is changing your pasture worthwhile ?. Irish Farmers Journal April 2006

O’Donovan M and Hurley G. 2006 Important to get reseeding right. Irish Farming Independent April 2006

O’Donovan M. 2005 Reseeding a good investment? Irish Farming Independent, Tuesday 26th July 2005.

O’Donovan M. 2005 In service training to dairy advisors (March/April)

O’Donovan M. and Horan, B (2004). Early spring grazing guidelines.Todays Farm Vol 15 No 2 March /April 2004

O’Donovan M. and Horan, B (2004). Planning holds key to success of next grazing season. Farming Independent, Tuesday, 24 August 2004.

O’Donovan M., Gowen, N., Casey, I., and Stakelum, G. (2002) The effect of grass cultivars differing in heading date and grass ploidy on the milk production performance of spring calving dairy cows. Proceedings of the Greenmount Agricultural College ‘High Milk from Forage’ Conference, March 2002

Gowen, N., O’Donovan M., Casey, I., and Stakelum, G. (2002) Improving cow performance at grass, what do grass cultivars offer?. Proceedings of the Irish Grassland Association Conference, Limerick April, 2002.

Kelly, F and O’Donovan M. (1999). New method of reseeding grassland. In – A new agenda for dairying, Moorepark Open day Book

O’Donovan M. and Casey, I and Gowen, N (1999). Milk production potential of different sward varieties. In – A new agenda for dairying, Moorepark Open day Book.

O’Donovan M., Ryan, G., and Stakelum, G. (1999). Concepts in grassland management for milk production. In – A new agenda for dairying, Moorepark Open day Book.

O’Donovan M. and Dillon, P,. (1998). Mid season grassland management. Todays Farm - Vol 9,1, pp 20-23.

O’Donovan M. and Dillon, P,. (1998). Beating the spring grass trap. Todays Farm - Vol 8,5, pp 28-29.

Stakelum, G., O’Donovan M. and Maher, J. (1997). The principles of Autumn Grassland Management - Moorepark Guidelines. Todays Farm - Vol 8 July/August pp 22-23.

Dillon, P., O’Donovan M. and Stakelum, G. (1997). Autumn grazing management for spring calving dairy cows. Irish Farmers Journal August 20th.

 Thesis (title and abstract)

Emer Kennedy (November 2006) – Main Supervisor

Fergal Burke (November 2006) – Co Supervisor

O’ Donovan, M. (1997). Improved Techniques for Grazing Management. M.Agr.Sc. Thesis, University College Dublin.

A5 – Grainne Hurley (Queens University Belfast)