Extension Agronomy eUpdate-Issue 1110: July 2, 2026

	Plant Analysis for Testing Nutrient Levels in Corn Plant tissue testing provides valuable insight into crop nutrition throughout the growing season. Learn the proper sampling techniques for corn, what nutrients to analyze, and how to interpret laboratory results for better nutrient management decisions.
	Identifying Nutrient Deficiency Symptoms in Soybeans Seeing yellow or discolored soybean leaves? This article highlights common nutrient deficiency symptoms in soybeans and explains how nutrient mobility within the plant can help identify the underlying cause. Photos of several common deficiencies are included to aid diagnosis.
	Tar Spot in Kansas – Levels Remain Low Tar spot has been confirmed in additional Kansas counties, although disease pressure remains low. Don't wait until disease is widespread before scouting your fields. This article reviews identification, fungicide timing, and current disease distribution across the state.
	Cover Crops for Weed Suppression After Wheat Harvest Can cover crops reduce herbicide applications? Kansas research shows that well-managed cover crops can provide weed suppression while fitting into no-till production systems. Learn which species work best and how to maximize their effectiveness.
	Weed Control Challenges with Delayed Grain Sorghum Planting Planting delays can complicate weed control in grain sorghum, where postemergence herbicide options are already limited. Learn how to adjust herbicide programs when residual activity has diminished or weeds emerge before applications can be completed.
	Late-Season Herbicide Applications in Corn Recent rainfall has delayed postemergence herbicide applications in many Kansas corn fields, allowing weeds to continue growing. This article reviews herbicide options for corn taller than 12 inches and highlights important growth stage restrictions to consider before spraying.
	Considerations for Non-Glyphosate Tolerant Cotton New cotton varieties without glyphosate tolerance are now available for Kansas producers. This article discusses the potential seed cost savings, weed management considerations, and herbicide options for successfully managing non-glyphosate-tolerant cotton.