Soil groups matched with the phosphorus (P) content and crop group demands.
Next: Table 2: Potassium (K) Content
| Soil Group | Low | Optimum | High |
|---|---|---|---|
| Soil Test P (ppm) | |||
| Demand level 1: Soybean, Small grains (excl. wheat), Oilseed crops, Clover | |||
| Loamy | 10—15 | 16—20 | 21—30 |
| Sandy, Organic | 12—22 | 23—32 | 33—42 |
| Demand level 2: Alfalfa, Beans, Sweet corn, Stone fruits | |||
| Loamy | 12—17 | 18—25 | 26—35 |
| Sandy, Organic | 18—25 | 26—37 | 38—55 |
| Demand level 3: Carrot, Pepper, Brassicas, Leafy greens, Onion | |||
| Loamy | 15—30 | 31—45 | 46—75 |
| Sandy, Organic | 18—35 | 36—50 | 51—80 |
| Demand level 4: Potato, Tomato, Tobacco | |||
| Loamy | 100—160 | 161—200 | >200 |
| Sandy, Organic | 30—60 | 61—90 | 91—120 |
