Nitrogen Fertilizer Evaluation in Spatially Derived Soil EC Management Zones

The objective of the study is to determine how to nitrogen fertilizers can be refined to increase fertilizer use efficiency using soil characteristics to derive management zones. A field was mapped using Veris MSP 3 for soil EC, pH, and soil color and delineated into 3 zones where a nitrogen rate study was superimposed for 4 growing seasons on a corn and cotton rotation. Total nitrogen (both residual and applied) is being used to determine if there is a difference in nitrogen use efficiency between EC zones.