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ProCrop |
Nutrient Recommendations for Alfalfa
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+ |
| tons/a | lb/acre-2' | lb P2O5/acre | lb P2O5/acre | lb P2O5/acre | lb P2O5/acre | lb P2O5/acre | |
| 2 | 35 | 35 | 25 | 15 | 10 | 0 | |
| 4 | 65 | 65 | 50 | 30 | 10 | 0 | |
| 5 | 85 | 85 | 60 | 40 | 15 | 0 | |
| 6 | 100 | 100 | 70 | 45 | 15 | 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 | |||||
| tons/a | lb/acre-2' | lb K2O/acre | lb K2O/acre | lb K2O/acre | lb K2O/acre | lb K2O/acre | |
| 2 | 35 | 105 | 75 | 45 | 10 | 0 | |
| 4 | 65 | 195 | 140 | 80 | 25 | 0 | |
| 5 | 85 | 245 | 170 | 100 | 30 | 0 | |
| 6 | 100 | 295 | 205 | 120 | 35 | 0 |
Bray-I P recommendation = (18.57-0.93 STP)YG
Olsen P recommendation = (18.57-1.16 STP)YG
Potassium recommendation = (55.71-0.38 STK)YG
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