Effects of irrigation on the chemical properties of a soil in the western san joaquin valley, California

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Abstract
Chemical properties of a native and irrigated soil in the arid, western portion of the San Joaquín Valley of California were determined. Both soils formed from alluvium deposited less than 500 years ago and lacked significant pedogenic development. The irrigated soil, which had been cultivated for 8 years, contained approximately one half the soluble salt (2120 vs. 5600 kg ha−1) and soluble Se (96 vs. 222 g ha−1) of the native soil. Leaching reduced the total CaCO3 content of the irrigated soil by 56 x 103 kg ha−1 from that of the native soil. Based on stable C isotope analysis, it was estimated that approximately 33% of the total CaCO3 in the irrigated soil had dissolved and reprecipitated during the period that it had been cultivated.

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