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A Steady‐State Conceptual Nitrogen Model for Estimating Nitrogen Emissions from Cropped Lands
Author(s) -
Tanji Kenneth K.,
Fried Maurice,
Van De Pol Ronald M.
Publication year - 1977
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1977.00472425000600020010x
Subject(s) - nitrogen , nitrogen balance , leaching (pedology) , steady state (chemistry) , environmental science , zea mays , computation , material balance , agronomy , conceptual model , cropping , hydrology (agriculture) , environmental engineering , agricultural engineering , soil science , atmospheric sciences , mathematics , agriculture , chemistry , soil water , ecology , engineering , physics , computer science , process engineering , biology , geotechnical engineering , organic chemistry , algorithm , database
Details of a conceptual nitrogen model are presented. The model is based upon the principles of mass balance and steady state. It considers both water and N flows into and out of the crop root zone. Illustrative computations are given for estimating steady‐state N leaching losses from two corn ( Zea mays L.) field sites and comparisons are made with measured values. This model may be applied to other crops or cropping practices.