Soil groups matched with the potassium (K) content and crop group demands.
Next: Table 3: Suggested P2O5 and K2O Application Rates
| Soil group | Low (L) | Optimum (O) | High (H) |
|---|---|---|---|
| Demand level 1: Soybean, Small grains (excl. wheat), Oilseed crops, Clover | |||
| Loamy | 70—100 | 101—130 | 131—160 |
| Sandy, Organic | 45—65 | 66—90 | 91—130 |
| Demand level 2: Alfalfa, Beans, Sweet corn, Stone fruits | |||
| Loamy | 90—110 | 111 - 140 | 141 - 170 |
| Sandy, Organic | 50—80 | 81—120 | 121—160 |
| Demand level 3: Carrot, Pepper, Brassicas, Leafy greens, Onion | |||
| Loamy | 80—140 | 141—200 | 201—220 |
| Sandy, Organic | 50—100 | 101—150 | 151—165 |
| Demand level 4: Potato, Tomato, Tobacco | |||
| Loamy | 80—120 | 121—170 | 171—190 |
| Sandy, Organic | 70—100 | 101—130 | 131—160 |
