In this episode of XtremeAg’s Cutting the Curve, Damian Mason interviews agronomist Mike Evans of Calibrated Agronomy about the importance of R-stage fertility management in corn and soybeans. The discussion focuses on why growers should reserve part of their fertility budget for reproductive growth stages, when nutrient demand is highest and yield potential can still be influenced. Evans explains the value of sap analysis for identifying nutrient deficiencies, discusses timing considerations for corn and soybean fertility applications, highlights key nutrients such as potassium, boron, sulfur, and zinc, and outlines practical application methods including aerial, drone, ground rig, and pivot fertigation. The conversation emphasizes measuring results, adapting programs to local conditions, and making informed fertility decisions that improve yield and profitability.