Spring Wheat
Spring Wheat N Advice
Nitrogen recommendations (kg/ha) for Spring Wheat based on soil N index and crop yield potential (t/ha)* | |||
---|---|---|---|
Soil N Index | 7.5 | 8.5 | 9.5 |
1 | 160 | 180 | 200 |
2 | 130 | 130 | 150 |
3 | 75 | 95 | 115 |
4 | 40 | 60 | 80 |
To convert kg/ha to units/ac multiply by 0.8 |
* Proof of higher grain yields is required for an additional 20kgN/ha for each one tonne above a base grain yield of 7.5t/ha
* Higher grain yields shall be based on the best yield achieved in any of the 3 previous harvests, at 20% moisture content.
Suggested N Programme for 9.5t/ha Spring Wheat on soil N index 1 | |||
---|---|---|---|
Crop Type | Seedbed | Mid-Tillering | GS 31/32 |
Feeding Wheat Option 1 (200kg/ha)1 |
50kg/ha | 100kg/ha | 50kg/ha |
Feeding Wheat Option 2 (200kg/ha)1 |
50kg/ha | 50 + 50kg/kg/ha (Split during tillering) |
50kg/ha |
Milling Wheat Option 3 (220kg/ha)2 |
50kg/ha | 100kg/ha | 70kg/ha (+30kg/ha at grain fill) |
* For thin crops to encourage tiller numbers, split nitrogen during tillering.
* Where milling wheat is grown under a milling contract an extra 30 kg/ha improve grain protein
Additional N is recommended for milling wheat varieties.
Apply additional 30 N kg N/ha is permitted for spring wheat grown under a milling contract with a merchant / co – op. It is recommended to apply this additional N at flag leaf emergence (GS 39) in the form of CAN fertiliser or an application of liquid N in the form of urea at the milky ripe stage (GS 71 – 75). This will increase the protein level by 0.5 – 1.0%.
P & K Advice for Spring Wheat
P & K Advice (kg/ha) for Spring Wheat based on different crop yields (kg/ha) | ||||||
---|---|---|---|---|---|---|
Soil P & K Index | 7.5 | 8.5 | 9.5 | |||
P | K | P | K | P | K | |
1 | 49 | 120 | 53 | 130 | 56 | 140 |
2 | 39 | 105 | 43 | 125 | 46 | 135 |
3 | 29 | 90 | 33 | 100 | 36 | 110 |
4 | 0 | 0 | 0 | 0 | 0 | 0 |
To convert kg/ha to units/ac multiply by 0.8 * Higher grain yields shall be based on the best yield achieved in any of the 3 previous harvests, at 20% moisture content. *Where pH is greater than or equal to 7, 20kg P/ha may be applied on soils at phosphorus index 4. |
* Always adjust nutrient applications where organic manures are applied