A simple nitrate submodel for trickle fertigated potatoes

✍ Scribed by N. K. Narda; J. K. Chawla

• Book ID: 102286297
• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 104 KB
• Volume: 51
• Category: Article
• ISSN: 1531-0353
• DOI: 10.1002/ird.65

✦ Synopsis

Abstract

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.