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Irrigation and Nitrogen Management Impacts on Ground-Water Quality

by W. F. Ritter, Univ of Delaware, United States,
R. W. Scarborough, Univ of Delaware, United States,
A. E. M. Chirnside, Univ of Delaware, United States,



Document Type: Proceeding Paper

Part of: Planning Now for Irrigation and Drainage in the 21st Century

Abstract:

The effect of irrigation management and nitrogen management on ground-water quality has been evaluated for four years on a sandy loam Coastal Plain soil. Nitrogen sidedressing and fertigation practices were investigated along with full irrigation and partial irrigation (irrigate every other time) treatments. Over the three-year period nitrate concentrations in the ground-water gradually increased for all management practices. Nitrate concentrations for full irrigation increased more rapidly than for partial irrigation. It appears nitrate leaching cannot be completely eliminated on irrigated sandy loam soils in the humid region.

Subject Headings: Irrigation | Groundwater management | Groundwater quality | Nutrient pollution | Nitrogen | Water quality | Quality control

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