The Custom calculator can be used to help create potassium recommendations for your fertility strategies.
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
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
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