Agronomy eUpdate July 31st, 2025

Issue 1064

Liming soils for optimum wheat production

Wheat fields across central and south-central Kansas are increasingly affected by acidic soils, often due to long-term nitrogen use. This article outlines the impact of low pH on wheat performance, how liming can restore productivity, and answers common questions on rates, timing, and economic return.

wheat lime application soil pH soil fertility low pH 

Plan ahead: Allow time for lime applications for alfalfa production

Soil acidity can significantly limit alfalfa performance for years. This article walks through lime recommendations, explains the economics and chemistry behind lime choices, and offers clear guidance to ensure your next alfalfa stand thrives.

alfalfa lime application soil pH soil fertility liming 

Southern rust continues to spread in Kansas this season

Southern rust has been confirmed in at least 21 Kansas counties as of July 31 and is now active across the region. This article offers scouting tips, fungicide guidance, and frequently asked questions to help growers make timely, informed management decisions.

corn disease southern rust 

Corn leafhopper confirmed in additional Kansas counties

Corn leafhopper, the vector of corn stunt disease, has now been confirmed in at least seven Kansas counties. Learn about identification, sampling protocols, management considerations, and how to access K-State's free testing and statewide monitoring network.

insects corn stunt corn leafhopper corn 

Dual-purpose wheat variety performance results for 2025

An updated Wheat Rx publication evaluates the performance of several winter wheat varieties in dual-purpose systems compared to grain-only systems. Results include fall forage yield, first hollow stem, plant height, and grain yield. Top varieties are highlighted.

fall forage dual purpose grazing wheat first hollow stem 

Coleoptile length of winter wheat varieties 2025

An updated publication in the Wheat Rx series evaluates the coleoptile length of winter wheat varieties grown in Kansas. Longer coleoptiles help ensure successful emergence when wheat is sown deep to reach moisture. See which varieties performed best in 2024-2025 trials.

wheat Wheat Rx coleoptile