Potash Cost Per Acre for Soybeans 2026

Soybean potash costs average $25–$45 per acre in 2026 at 70–100 lb K2O/acre maintenance rates. Soybeans remove approximately 1.4 lb K2O per bushel — the highest removal rate of any major row crop.

2026 Cost Breakdown

At 60 bu/acre, soybeans remove 84 lb K2O. Maintenance applications cost $30–$45/acre at current MOP prices. Build rates on low-K soils run $50–$70/acre and are typically applied every 2–4 years.

K application	Rate	Cost/acre
MOP maintenance 60 bu/ac goal	70–100 lb K2O	$26–$38
MOP build rate low-K soil	120–150 lb K2O	$45–$57
Sul-Po-Mag (adds Mg+S)	70 lb K2O equiv.	$35–$48

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 Soybeans — 2026 Benchmarks

2026 Cost Breakdown

How to Reduce Input Costs Per Acre

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