A simple nitrate submodel for trickle fertigated potatoes
2002
Narda, N.K. | Chawla, J.K.
A simple nitrate dynamics submodel capable of predicting the spatial distribution of NO3-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 NO3-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 NO3-N have matched reasonably well with the observed data.
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