How does the Iowa calculator determine my potassium needs?
Overview:
The Iowa calculator can be used to help create potassium recommendations.
Answer:
The Iowa calculator utilizes the following equations:
|
Nutrient |
Crop |
Build/Maintenance |
|
Potassium |
Corn |
If STK <= 160 then K Rec = (138.5 - (0.825 * STK)) / (1 - (0.00532 * STK); if STK >= 161 and <= 200, then K Rec = (0.22 * Yield) |
|
Potassium |
Soybeans |
If STK <= 160 then K Rec = (127.9 - (0.699 * STK)) / (1 - (0.00476 * STK); if STK >= 161 and <= 200 then K Rec = (1.20 * Yield) |
