Ph.D. and M.S. graduate assistantships are available beginning January 2023 in the Soil Nutrient Management and Water Quality Lab in the Department of Agronomy and Horticulture at the University of Nebraska-Lincoln. Highly motivated students are sought for these positions. The students will work on the 4Rs of Nitrogen Management and evaluate their impact on optimizing crop production and nutrient use efficiency while reducing the negative impact of fertilizer use on the environment. The students will use a combination of laboratory and field experiments and perform soil, water and crop sampling and analysis to develop guidelines for the efficient use of nutrients derived from synthetic fertilizers and livestock manure. The students will have the opportunity to work with diverse