Abstract
AbstractA method is proposed for quantitative evaluation of the relationship between irrigation water quality and soil structural stability under a specified set of climatic conditions. Quantitative criteria for pore structural stability are provided by a family of threshold concentration curves determined empirically for each soil. After estimating the variation in composition and concentration of soil water as a function of rainfall, evapotranspiration, and soil drainage, intersection of the sodium stability curve with the irrigation water‐soil solution rectangle provides the necessary quantitative index. A similar approach for evaluating crop response to salinity is presented. The method provides quantitative evaluation of irrigation water quality in relation to soil structural stability and crop salinity tolerance.
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