Potassium Rate Calculator
Estimate potassium fertilizer application rate in pounds of K₂O per acre.
Inputs
How It Works
Potassium Rate (lbs K₂O/acre) =
(Yield × Removal per Bushel) − Soil Test Credit
Adjusts fertilizer to replace crop removal.
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FAQ
Why is potassium important?
Potassium supports water regulation, disease resistance, and grain fill.
What is K₂O?
Fertilizer potassium is reported as K₂O equivalent on product labels.
Should I apply removal rates only?
Removal-based rates maintain soil fertility, but soil test levels may require buildup rates.
Understanding Potassium Fertilizer Rates
Potassium (K₂O) plays a vital role in crop production by regulating water movement, enzyme activation, and stress tolerance. Adequate potassium improves stalk strength, enhances grain fill, and supports overall plant health. Maintaining proper potassium levels is essential for maximizing yield potential and protecting long-term soil productivity.
This potassium rate calculator estimates fertilizer requirements based on crop yield and nutrient removal rates. By multiplying yield by potassium removal per bushel, growers can estimate total K₂O removed at harvest. Soil test credits are then subtracted to reflect existing fertility levels.
Replacement-based fertilization supports sustainable nutrient management while preventing soil depletion. For low-testing soils, additional buildup applications may be necessary to reach optimal levels. Always reference soil test recommendations when planning potassium applications.