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Applied and Environmental Soil Science
Volume 2011 (2011), Article ID 873625, 12 pages
http://dx.doi.org/10.1155/2011/873625
Research Article

Status and Causes of Soil Salinization of Irrigated Agricultural Lands in Southern Baja California, Mexico

1Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
2Centro de Investigaciones Biologicas del Noroeste, La Paz, BCS 23090, Mexico

Received 17 September 2010; Revised 28 December 2010; Accepted 18 March 2011

Academic Editor: Paul Voroney

Copyright © 2011 Tsuneyoshi Endo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Selected farmlands in southern Baja California, Mexico, were surveyed to determine the levels and the causes of salinization/sodication in irrigated agricultural soil. The salt dynamics observed in profiles differed from farm to farm. Low EC and high pH levels were observed in the profiles of sandy fields, because the salt composition of these soils can easily change when salts are leached by irrigation water that contains carbonates of sodium. On the other hand, high levels of salinity and sodicity were observed in the soils of clayey fields. Soil salinization/sodication is complexly interrelated with soil characteristics, the amount and composition of salts in the soil, the quantity and quality of irrigation water applied, and the irrigation methods used. Our findings indicate that irrigation water in Baja California should be supplied at a rate that is sufficient to meet crop requirements without exacerbating salt accumulation.