Phosphorus Cost Per Acre for Corn 2026

Phosphorus fertilizer costs for corn average $35–$65 per acre in 2026 at 80–100 lb P2O5/acre, using DAP or MAP as the primary source. China phosphate export restrictions are keeping phosphate prices elevated.

2026 Cost Breakdown

At 80 lb P2O5/acre using DAP ($700/ton, 46% P2O5), phosphorus costs approximately $50–$60/acre for maintenance applications on medium-testing soils. Build rates for deficient soils run $70–$90/acre.

P source	Rate	Cost/acre
DAP (18-46-0)	80 lb P2O5/acre	$48–$62
MAP (11-52-0)	80 lb P2O5/acre	$46–$60
10-34-0 starter (in-furrow)	20 lb P2O5/acre	$11–$16

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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Phosphorus Cost Per Acre for Corn — 2026 Benchmarks

2026 Cost Breakdown

How to Reduce Input Costs Per Acre

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