Missouri Corn Grower Tops 200 Bushels Despite Heat

Missouri row-crop operators face higher fertilizer costs and shorter grain-fill windows when August heat shuts plants down early.

Updated on Nov. 4, 2026 in Agriculture

Wide photograph of a late-season Midwestern cornfield with dry stalks and drying ears under late-afternoon light, rows receding toward a distant tree line. — Patrick Seyer harvested more than 200 bushels of corn per acre on 1,400 acres near Oran, Missouri, despite an August heat wave that cut the season short. AI Illustration. Upload story photo >

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Patrick Seyer harvested above 200 bushels of corn per acre on his 1,400 acres near Oran, Missouri, a yield above his average. The result came despite a two-to-three-week August heat wave that cut the growing season short for Missouri corn growers.

Why it matters

Early shutdown from heat in August likely reduced yields, so the above-average result is notable for operators weighing crop management choices. Rising fertilizer prices, driven by higher commodity prices, also raise input costs for Missouri row-crop farms this cycle.

Seyer's 1,400 acres of corn near Oran produced above 200 bushels per acre, above his own average, while a two-to-three-week August heat wave shut plants off early. The source does not give a statewide or regional yield comparator.

The players

Patrick Seyer

Missouri row-crop farmer operating 1,400 acres of corn near Oran who uses cereal rye cover crops and reduced fungicide inputs.

The details

Seyer used barely any fungicide on his GMO corn and a little more on his non-GMO corn, and he harvested soybeans with a combine while the corn harvest was nearly complete. Heat in August shut the plants off sooner than expected, which likely reduced yields, while ideal moisture all summer kept conditions favorable. Corn in the field dried faster than it could be harvested, a timing pressure that affects harvest scheduling for growers in the state.

August 2026: Two to three weeks of extreme heat shut the plants off early.
2026 growing season: Corn harvest completed with above-average yields.
Next year: Seyer is considering annual rye as a cover crop.

Market Landscape

Seyer's cereal rye cover crop program, which has increased soil organic matter and reduced erosion on his fields, places his operation within the cover-crop practice used by Missouri growers seeking soil gains. His consideration of annual rye for its deeper root system represents a specific adjustment within that practice.

Missouri row-crop operators should factor rising fertilizer costs into next season's budgets and track how heat timing affects yields. Growers considering cover crops should weigh soil organic matter and erosion benefits against seeding and termination costs.

The takeaway

Operators should budget for higher fertilizer costs while watching how early-season heat shortens the grain-fill window. Growers testing cover crops should log soil organic matter and erosion results season over season to judge whether the practice pays off on their own acreage.