HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Cass, A. Articles by Sumner, M. E. Search for Related Content PubMed Articles by Cass, A. Articles by Sumner, M. E. Agricola Articles by Cass, A. Articles by Sumner, M. E.

Soil Pore Structural Stability and Irrigation Water Quality: III. Evaluation of Soil Stability and Crop Yield in Relation to Salinity and Sodicity¹

ABSTRACT

A 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.

¹ Contribution from the Dep. of Soil Science and Agrometerology, Univ. of Natal, Pietermartizburg, South Africa, and Dep. of Agron., Univ. of Georgia, Athens, GA 30602.

² Senior Lecturer in Soil Science, University of Natal, and Professor of Agronomy, University of Georgia.

Received for publication April 3, 1981. Accepted for publication January 22, 1982.