Depth distribution of salts in soils irrigated by means of permanent furrows

Pratt, P; Jones, W

Depth distribution of salts in soils irrigated by means of permanent furrows

Authors

P. F. Pratt
W. W. Jones

Authors Affiliations

P. F. Pratt was Professor of Soil Science, and Chemist in the Experiment Station, Riverside; W. W. Jones was Professor of Horticulture, and Horticulturist in the Experiment Station, Riverside.

Publication Information

Hilgardia 42(1):1-15. DOI:10.3733/hilg.v42n01p001. May 1973.

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Abstract

Analyses of saturation extracts of soil samples from six treatments of a long-term fertility trial, in which irrigation was by gravity flow into permanent furrows, indicated considerable retention of salt within the root zone. Most of the salt retention was within the 0- to 8-foot depth, but some extended into the 10- to 15-foot depth. Salt concentrations within the root zone were correlated with leaching fractions. Analyses of samples from below the 10-foot depth showed that drainage waters had much lower salt contents than the water of the root zone, and suggest that the drainage waters effectively by-passed soil volumes of higher salt concentration in the root zone. Because of salt retention in the root zone of the permanent-furrow gravity-flow irrigation system, higher leaching fractions are required to prevent accumulation of adverse salt concentrations than would be the case for many other systems.

Literature Cited

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