Effects of Time of Nitrogen Application on Wheat and Nitrogen Application Rates on Grain Sorghum for a Wheat-grain Sorghum Double-cropping System under Dryland Conditions

This study concerns the effects of time and rate of nitrogen applications in a wheat-grain sorghum double-cropping system. The major objective was to determine the best time of nitrogen application to wheat and the optimal rate of nitrogen application to grain sorghum. The effects of nitrogen application rates on soil pH and nitrate accumulation in the soil profile were also studied. This study was conducted over a three year period (1978-1981) at the Eastern Research Station near Haskell, Oklahoma.Agronom