How does the Custom calculator determine my potassium needs?
Overview:
The Custom calculator can be used to help create potassium recommendations for your fertility strategies.
Answer:
The Custom calculator utilizes the following equations:
|
Potassium |
Corn |
IF STK <= OPTL then K Rec = ((OPTL - STK) * ((8 + (1 + (0.05 * CEC)) / 2) / Years)) + (Yield * 0.27) If STK > OPTL and STK <= OPTH then K Rec = (Yield * 0.27) If STK > OPTH and STK <= OPTH + 40 then K Rec = (Yield * 0.27) - ((Yield * 0.27) * (STK - OPTH)) / 40 |
|
Potassium |
Soybeans |
IF STK <= OPTL then K Rec = ((OPTL - STK) * ((8 + (1 + (0.05 * CEC)) / 2) / Years)) + (Yield * 1.40) If STK > OPTL and STK <= OPTH then K Rec = (Yield * 1.40) If STK > OPTH and STK <= OPTH + 40 then K Rec = (Yield * 1.40) - ((Yield * 1.40) * (STK - OPTH)) / 40 |
