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Nitrate Concentrations in the Unsaturated Zone Beneath Irrigated Fields in Southern California
Author(s) -
Pratt P. F.,
Adriano D. C.
Publication year - 1973
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1973.03615995003700020043x
Subject(s) - volatilisation , dns root zone , leaching (pedology) , nitrate , drainage , environmental science , hydrology (agriculture) , soil water , nitrogen , agronomy , soil science , geology , chemistry , ecology , biology , geotechnical engineering , organic chemistry
Nitrate concentrations in the drainage water of the unsaturated zone beneath the soil‐root zone were predicted from data for N inputs, N removal in harvested crops, and the drainage volume. Ratios of these predicted values to measured values were related to the volatilization losses or unaccounted‐for inputs expressed as a fraction of the excess N defined as the N input minus N removal in harvested crops. Volatilization losses or unaccounted‐for inputs were calculated as known inputs minus removal in harvested crops minus that removed from the soil‐root system by leaching.