Hilgardia
Hilgardia
Hilgardia
University of California
Hilgardia

Nitrate concentrations in the unsaturated zone beneath some selected row-crop fields

Authors

D. C. Adriano
P. F. Pratt
F. H. Takatori
K. M. Holtzclaw
J. B. Johanson

Authors Affiliations

D. C. Adriano Department of Plant Sciences, University of California, Riverside; P. F. Pratt is Professor of Soil Science, Department of Plant Sciences, University of California, Riverside; F. H. Takatori is Research Specialist, Department of Plant Sciences, University of California, Riverside; K. M. Holtzclaw Department of Plant Sciences, University of California, Riverside; J. B. Johnson are Staff Research Associates in the Department of Soil Science and Agricultural Engineering, University of California, Riverside.

Publication Information

Hilgardia 26(2):8-10. DOI:10.3733/ca.v026n02p8. February 1972.

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Abstract

Today's nitrogen fertilization practices for row-crop production (especially vegetables) in the Santa Ana Drainage Basin leave various amounts of NO3-N in drainage water. In nine sites selected for this study, the average NO3-N concentrations in the drainage water in the unsaturated zone (that portion of the soil profile from the root systems to the 50-ft depth or water table) were all above the 10 ppm NO3-N public standard for drinking water. Six sites had average NO3-N concentrations more than five times greater than this standard, whereas, two sites had NO3-N concentrations more than 10 times greater. The amount of NO3-N in drainage water was affected by N inputs, removal of N when crops are harvested, drainage volume, and gains and losses of NO3.

Adriano D, Pratt P, Takatori F, Holtzclaw K, Johanson J. 1972. Nitrate concentrations in the unsaturated zone beneath some selected row-crop fields. Hilgardia 26(2):8-10. DOI:10.3733/ca.v026n02p8
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