Date of this Version
Thesis (M.S.)—University of Nebraska—Lincoln, 1963. Department of Agronomy.
Crop Production in Nebraska is frequently limited by the fertility status of the soil. In recent years increased production has placed an increased demand on the soil to furnish the nutrient elements necessary for maximum crop yields. The single nutrient element which most frequently limits crop production is nitrogen.
An investigation was undertaken to evaluate some of the basic nitrogen behavior patterns. Specific objectives were: (1) to determine the quantitative effect of a compacted subsoil horizon on nitrogen storage; and (2) to obtain a quantitative measurement of nitrogen leaching and concentration under varying conditions.
Laboratory experiments were conducted in 1962 and 1963 to evaluate the movement of nitrate and ammonium-nitrogen through columns of soil material and the extent to which it is lost. Many variables were used-two soil types (Anselmo Loamy Sand and Sharpsburg Silty Clay Loam), two levels of compaction, two levels of fertilization, and two irrigation schemes.
Results of this study indicate that Ammonium-nitrogen penetrated to a greater depth in the Anselmo Loamy Sand compared to the Sharpsburg Silty Clay Loam.
Advisor: R. A. Olson