Changes in Distribution of Mineral Nitrogen under Native Range and Cultivated Fields at the Nebraska Sandhills Agricultural Laboratory

摘要

The objectives of the project were to: determine the distribution of nitrate-N, ammonium-N and Cl from the soil surface to the water table under cultivated irrigated fields and adjacent native range sites at the UNL Sandhills Ag. Laboratory; and compare the information with nutrient profiles taken during 1980 and 1981 to determine downward movement of the nitrate to the water table.