South Dakota is a major corn, soybean, and winter wheat state with the James River Valley and eastern South Dakota black soils averaging 155–175 bu/acre corn. Glyphosate (41% AI) is currently priced at $16–$22/gallon in South Dakota markets as of spring 2026, reflecting Great Plains supply chain conditions.
| Benchmark | Price | vs. 2025 |
|---|---|---|
| NOLA barge (national reference) | $14–$20/gallon | +15–25% |
| South Dakota co-op / distributor | $16–$22/gallon | +27–37% |
| South Dakota retail delivered | $16–$23/gallon | +29–39% |
Glyphosate is one of the few inputs priced favorably. Buy season supply early; tariff changes on Chinese generics could spike prices mid-year.
South Dakota receives fertilizer via Missouri River barge terminals at Sioux City and by rail; western South Dakota pays premiums of 12–18% over NOLA.
| Driver | Impact |
|---|---|
| Chinese generic production | China dominates global glyphosate API production; U.S. tariff policy determines import costs. |
| Tariff uncertainty | U.S.-China tariff changes in 2025–2026 added 10–25% landed cost variability on imported generics. |
| Generic vs. branded pricing | Generic 41% AI is functionally identical to branded Roundup; 30–40% cost savings available. |
| Resistance management costs | Glyphosate-resistant weeds force higher-cost alternative products on affected acres. |
South Dakota farmers typically source Glyphosate (41% AI) through regional co-operatives, independent retailers, and direct distributor contracts. The most effective strategy in Great Plains markets is to compare co-op pre-pay pricing versus spot retail, as pre-pay discounts of 5–12% are standard for early fall bookings.
As of spring 2026, Glyphosate (41% AI) in South Dakota is priced at approximately $16–$22/gallon. Prices vary by county, co-op, and contract type. GrainBrief tracks weekly USDA AMS price reports and sends price alerts when signals change.
South Dakota sits in the Great Plains supply zone. South Dakota receives fertilizer via Missouri River barge terminals at Sioux City and by rail. Premiums over NOLA benchmarks typically run 12–20% depending on season and logistics conditions.
Historically, fall pre-buy programs (August–October) offer the best pricing for the following spring application season. In-season spot prices during March–June carry a 5–15% logistics premium. GrainBrief's weekly signal tells you exactly when to act.
GrainBrief tracks USDA AMS, FRED, and EIA data weekly and sends you a buy, hold, or negotiate signal. Stop guessing. Start buying on data.
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