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A simple nitrate submodel for trickle fertigated potatoes
Author(s) -
Narda N. K.,
Chawla J. K.
Publication year - 2002
Publication title -
irrigation and drainage
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 38
eISSN - 1531-0361
pISSN - 1531-0353
DOI - 10.1002/ird.65
Subject(s) - fertigation , trickle , nitrate , drip irrigation , nitrification , environmental science , mathematics , soil water , hydrology (agriculture) , irrigation , soil science , nitrogen , chemistry , agronomy , engineering , computer science , geotechnical engineering , organic chemistry , biology , world wide web
A simple nitrate dynamics submodel capable of predicting the spatial distribution of NO 3 ‐N within the soil profile following N fertigation with urea through trickle irrigation has been formulated and validated. The model utilizes a best‐fit nitrification function which, on a particular day, converts a given quantity of urea into nitrate and also incorporates the cumulative effect of previous fertigations. The daily updated values of NO 3 ‐N of soil layers have been obtained by deducting the N‐uptake by plants calculated on the basis of root length present. The predicted values of NO 3 ‐N have matched reasonably well with the observed data. Copyright © 2002 John Wiley & Sons, Ltd.