Soil pore structural stability and irrigation water quality: III. Evaluation of soil stability and crop yield in relation to salinity and sodicity

Cass, A.; Sumner, M.E.

Soil Science Society of America Journal 46(3): 513-517


ISSN/ISBN: 0361-5995
DOI: 10.2136/sssaj1982.03615995004600030013x
Accession: 000982050

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A method is proposed for quantitative evaluation of the relationship between irrigation water quality and soil structural stability under a specific 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.