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ProCrop |
Nutrient Recommendations For Sunflower
Soil Test Phosphorus, ppm
| Soil N plus | VL | L | M | H | VH | ||
| Yield | fertilizer | Bray-1 | 0-5 | 6-10 | 11-15 | 16-20 | 21+ |
| goal | N required | Olsen | 0-3 | 4-7 | 8-11 | 12-15 | 16+ |
| lb/a | lb/acre-2' | lb P2O5/acre | lb P2O5/acre | lb P2O5/acre | lb P2O5/acre | lb P2O5/acre | |
| 1000 | 50 | 20 | 15 | 10 | 0 | 0 | |
| 1500 | 75 | 30 | 20 | 15 | 0 | 0 | |
| 2000 | 100 | 40 | 30 | 20 | 10 | 0 | |
| 2500 | 125 | 50 | 35 | 25 | 10 | 0 |
Soil Test Potassium, ppm
| Soil N plus | VL | L | M | H | VH | ||
| Yield | fertilizer | Bray-1 | 0-40 | 41-80 | 81-120 | 121-160 | 161+ |
| goal | N required | Olsen | |||||
| lb/a | lb/acre-2' | lb K2O/acre | lb K2O/acre | lb K2O/acre | lb K2O/acre | lb K2O/acre | |
| 1000 | 50 | 35 | 25 | 15 | 0 | 0 | |
| 1500 | 75 | 55 | 40 | 25 | 10 | 0 | |
| 2000 | 100 | 70 | 50 | 30 | 10 | 0 | |
| 2500 | 125 | 90 | 65 | 40 | 15 | 0 |
Nitrogen recommendation = 0.05 YG-STN-SDA-PCC
Bray-I P recommendation = (0.0225-0.0011 STP)YG
Olsen P recommendation = (0.0225-0.0014 STP)YG
Potassium recommendation = (0.04100-0.00027 STK)YG
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