Wet Fields Impact Crop Growth

By Blake Jackson

Heavy rainfall is becoming more common across Missouri, creating serious challenges for farmers even before the 2026 growing season begins. Saturated soils, standing water, and flooding can delay planting, reduce fieldwork time, and lower crop yields. Understanding how excess water affects crops can help farmers take steps to protect their fields and improve long-term resilience.

Missouri farmers are familiar with wet conditions. Data from the National Oceanic and Atmospheric Administration shows that the state experienced nine major flooding disasters between 1980 and 2024. These events made up nearly one-quarter of all weather-related economic losses. Flooding has also increased in recent years, raising the risk for agriculture.

Wet soils delay planting and reduce the number of workable field days. During peak planting seasons, farmers may lose two to three suitable working days each week. This can lead to late planting and lower yields.

Most Missouri soils, including silt loam and clay-based soils, drain slowly. When soils stay saturated, oxygen is pushed out, making it difficult for roots to grow. This can lead to weak plants or even plant death. Even after soils dry, damaged roots may not fully recover.

Flooding occurs when plants are underwater, while waterlogging happens when soil is saturated without standing water. Both conditions limit oxygen and stress crops. Corn is especially sensitive during early growth stages, and flooding for even one or two days can reduce growth and nutrient uptake. Yield losses can reach 7% to 20% depending on conditions. Soybeans are slightly more tolerant but still suffer under long periods of saturation.

Wet conditions also cause nitrogen loss, which is essential for crop growth. Farmers should evaluate fields carefully before applying additional fertilizer. Rescue applications may help in some cases.

Common symptoms include yellow leaves, stunted growth, and uneven stands. Wet weather also increases disease risks in corn, soybeans, and wheat.

After fields dry, farmers should delay fieldwork to avoid soil compaction. Managing weeds, improving drainage, and building soil health can help crops recover and reduce future risks.

Photo Credit: gettyimages-eugenesergeev