The objective of this project is to illustrate the utility of precision agriculture technologies for improving N recommendations for individual fields and localized areas within a field. These rates are comparable to the current Kansas State University N recommendation, yet producers applied about 70 kg N ha-1 greater than the recommended rate. Sites that were susceptible to denitrification or leaching typically resulted in lower soil N, lower leaf tissue N, lower grain yields, and lower N use efficiency.
Producers can minimize N rates and maximize yield by using precision agriculture technologies.
Corn Yield Response to In-row Placement of Iron Sulfate. The objective of this project is to determine the correct application rate of FeSO4 monohydrate for corn in SW Kansas and to evaluate the potential for targeted application using precision farming technologies. Five irrigated cornfields in SW Kansas were identified for Fe deficiency symptoms. A problematic area, known to display Fe chlorosis, within each field was identified. All Fe treatments had a greater average yield than the control.