Potash Cost Per Acre for Corn 2026

Potash (K2O) costs for corn average $30–$55 per acre in 2026 at 80–120 lb K2O/acre maintenance rates. Potash is the most favorably priced major nutrient in 2026.

2026 Cost Breakdown

Corn removes approximately 0.24 lb K2O per bushel. At 200 bu/acre, removal is 48 lb K2O/acre. Maintenance broadcast rates on medium-testing soils run 80–120 lb K2O/acre. At $350/ton MOP (60% K2O), that is $32–$48/acre.

K application	Rate	Cost/acre
MOP maintenance 200 bu/ac goal	80–100 lb K2O	$30–$38
MOP build rate low-K soil	120–160 lb K2O	$45–$60
K-Mag alternative (contains Mg+S)	80 lb K2O equiv.	$40–$52

How to Reduce Input Costs Per Acre

Soil-test every 3 years and skip maintenance applications where nutrient levels are already adequate.
Compare generic vs. branded on herbicides and fungicides — AI is identical at 20–35% lower cost.
Pre-buy in fall when logistics premiums are lowest; lock in anhydrous and potash before spring demand spikes.
Audit pass count — eliminating one unnecessary herbicide or fungicide pass saves $25–$50/acre.
Use GrainBrief price alerts to track weekly USDA AMS benchmarks and know when your quotes are above market.

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Potash Cost Per Acre for Corn — 2026 Benchmarks

2026 Cost Breakdown

How to Reduce Input Costs Per Acre

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