Calculate Potassium Application

IMPORTANT NOTE: The application rate that this form suggests is for correcting an imbalance only and does not include fertilization for crop removal. Please refer to our Application Guide which provides fertility programs for various crops.

Potassium (K) usually appears on soil test reports as parts per million (ppm) K. Occasionally, the value will appear as pounds per acre (ppa) K or K₂O (potash).
To convert ppa K or ppa K₂O to ppm K, Click here
To convert ppm K₂O to ppm K, divide by 1.2
Note: Do not use Effective Cation Exchange Capacity (ECEC) where Total Cation Exchange Capacity (CEC) is requested. To convert ECEC to CEC, click here.

Note: Soils that have CEC >15.0 are more difficult to saturate with the desired nutrient. Use the lower end of the normal saturation range where the CEC is very high.