1. Effect of 4R Nitrogen Management on Residual Soil Nitrate and Soil Health

Nitrogen is one of the most important and expensive inputs for forage, grain, vegetable, and fruit crops. Excessive fertilizer reduces profit for farmers and can cause environmental harm. Nitrate leaching is the main factor contributing to rising nitrate levels in groundwater, leading to water quality degradation. The 4R nutrient stewardship framework aims to optimize fertilizer management. The Right rate matches the amount of fertilizer to the crop needs, the Right source matches fertilizer type... K. Deep, M. Yost, J. Williams, B. Hopkins, G. Cardon, B. Black