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Low-Medium Yield Potential Soils
| CROP | NITROGEN | PHOSPHORUS (P2O5) |
|---|---|---|
Grass Seed | 30 – 60 | 10 – 25 |
Forage 20% Legume 40 – 90 | 10 – 30 | |
Grass-Legume 20-40% Legume | 30 – 65 | 20 – 30 |
40-60% Legume 10 – 30 | 20 – 40 | |
Legume Greater than 60% Legume | 0 – 30 | 30 – 50 |
Medium-High Yield Potential Soils
| CROP | NITROGEN | PHOSPHORUS (P2O5) | POTASSIUM(K2O) | SULPHUR |
|---|---|---|---|---|
Grass Seed | 30 – 70 | 10 – 30 | 30 – 50 | 0 – 10 |
Forage 20% Legume 60 – 100 | 10 – 30 | 50 – 60 | 10 – 15 | |
Grass-Legume 20-40% Legume | 40 – 90 | 20 – 40 | 50 – 70 | 15 – 30 |
40-60% Legume 20 – 40 | 30 – 40 | 50 – 80 | 15 – 30 | |
Legume Greater than 60% Legume | 0 – 30 | 40 – 70 | 60 – 150 | 15 – 30 |
High Yield Potential Soils
| CROP | NITROGEN | PHOSPHORUS (P2O5) | POTASSIUM(K2O) | SULPHUR |
|---|---|---|---|---|
Grass Seed | 45 – 100 | 30 – 50 | 40 – 60 | 0 – 15 |
Forage 20% Legume 60 – 200 | 30 – 50 | 40 – 60 | 0 – 15 | |
Grass-Legume 20-40% Legume | 60 – 80 | 40 – 60 | 60 – 80 | 15 – 20 |
40-60% Legume 0 – 60 | 40 – 80 | 80 – 150 | 15 – 30 | |
Legume Greater than 60% Legume | 0 – 50 | 60 – 100 | 80 – 200 | 20 – 30 |
*Residual response to the higher rates may persist for two years, particularly when the year of apllication is dry and production is low. Therefore annual application may not always be necessary.
Source: Adapted from various U.S State and Canadian Prairie Province Extension Bulletins.