Nitrogen Fertilizer Movement in the Soil as Influenced by Nitrogen Rate and Timing in Irrigated Wheat

Nitrogen fertilizer is a potential contaminant of groundwater supplies. The purpose of this study was to determine the influence of recommended N fertilizer rate and timing on N movement in the soil during the growing season. Durum wheat [ Triticum turgidum L. subsp. durum (Desf.) Husn.] was grown at Maricopa, AZ, during the 1991 and 1992 growing seasons. A N rate study was conducted at two sites on a sandy loam soil [coarse loamy, mixed...