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Generalized Results from Crop Yield Model with Saline Waters

Dep. of Soil and Water Science, Univ. of Arizona, Tucson, AZ 85721

*Corresponding author.

ABSTRACT

Crop yields as influenced by water quality and quantity are of immense interest in arid areas throughout the world. In this paper, earlier results are generalized for modeling crop yield under deficit irrigation with saline water. Linear yield response functions were used for both the amount of water utilized and response to salts. Results are presented in a compact table for a wide range of conditions for salinity, water and yield response parameters. Included in the analysis is the effect of variability of available water. Results are similar to those obtained when salinity is not a factor, in that more variability of available water generally leads to lower average yields. This relatively simple approach is believed applicable to many practical scenarios for which a lack of input parameters or need for expediency rules out more comprehensive modeling.

Support was, in part, by Western Regional Research Project W-155, Technical Paper 4480, Ariz. Agric. Exp. Stn.

Received for publication July 11, 1989.