Hidden Bibliographic Details
| Other authors / contributors: | University of California, Riverside. Department of Soil Science and Agricultural Engineering.
United States. Environmental Protection Agency. Office of Research and Monitoring.
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| Notes: | "Report date April 1972."
Includes bibliographical references (pages 41-42).
Also issued online.
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| Summary: | Because of a tremendous increase in the concern for nitrate (NO3̄) in surface and ground waters, the study of NO3̄ leaching has become very important. The present investigation was undertaken to determine the potential contribution of fertilizer N use on citrus and row crops to the NO3̄ in ground waters in the Santa Ana River Basin of Southern California where a deep unsaturated zone exists between the soil profile or crop-root zone and the water table or saturated zone. The objectives were to relate NO3̄ concentrations in the unsaturated zone to N inputs, N removal by harvested crops and the volume of drainage water, to obtain some estimates of transit times for drainage water through the unsaturated zone, to estimate denitrification losses on a field basis, and to assess the probable effects of present fertilizer N recommendations on NO3̄ in ground waters.
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| Other form: | Online version: Pratt, P.F. (Parker F.). Nitrate in the unsaturated zone under agricultural lands. [Washington, U.S. Environmental Protection Agency]; for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1972
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| Govt.docs classification: | EP 1.16:16060 DOE 04/72
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