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Influence of Time and Rate of Nitrogen Fertilization on Grain Sorghum Production under Surface and Subsurface Irrigation
Date of this Version
Thesis (M.S.)—University of Nebraska—Lincoln, 1972. Department of Agronomy.
Subsurface irrigation through plastic pipes is currently being considered as an efficient and nonpolluting method of applying water, fertilizers, herbicides, and insecticides to crops (Andersen, 1971; Mitchell and Usherwood, 1967).Precisely controlled applications of these may be necessary in the future to increase net profits while minimizing pollution problems.
One purpose of this study was to make further evaluations on this effect.This was accomplished by varying the number and size of nitrogen applications at various stages of growth.The resulting differences in yield and percent and total protein provided a practical method for testing various nitrogen applications through a subsurface irrigation system.
Advisor: Jerry W. Maranville
Copyright 1972, the author. Used by permission.