Depth distribution of salts in soils irrigated by means of permanent furrows
AuthorsP. F. Pratt
W. W. Jones
Authors AffiliationsP. 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.
Hilgardia 42(1):1-15. DOI:10.3733/hilg.v42n01p001. May 1973.
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.
Cahoon G. A., Morton E. S., Jones W. W., Garber M. J. Effects of various types of nitrogen fertilizers on root density and distribution as related to water infiltration and fruit yields of Washington navel oranges in a long-term fertilizer experiment. Proc. Amer. Soc. Hort. Sci. 1959. 74:280-99.
Harding R. B. Surface accumulation of nitrates and other soluble salts in California orange orchards. Soil Sci. Soc. Amer. Proc. 1954. 18:369-72. DOI: 10.2136/sssaj1954.03615995001800040005x [CrossRef]
Harding R. B., Pratt P. F., Jones W. W. Changes in salinity, nitrogen and soil reaction in a differentially fertilized irrigated soil. Soil Sci. 1958. 85:177-184. DOI: 10.1097/00010694-195804000-00001 [CrossRef]
Harding R. B., Ryan T. M. Soil salinity and water distribution under nontillage and tillage in a differentially fertilized, irrigated citrus orchard. Proc. Amer. Soc. Hort. Sci. 1961. 77:155-66.
Jones W. W., Cree C. B., Embleton T. W. Some effects of nitrogen sources and cultural practices on water intake by soil in a Washington navel orange orchard and on fruit production, size, and quality. Proc. Amer. Soc. Hort. Sci. 1961. 77:146-154.
Jones W. W., Embleton T. W. Nitrogen-grade-packout relations in valencias. Calif. Citrograph. 1960. 45:241-42.
Jones W. W., Embleton T. W. Yield and fruit quality of ‘Washington’ navel orange trees as related to leaf nitrogen and nitrogen fertilization. Proc. Amer. Soc. Hort. Sci. 1967. 91:138-42.
Nielsen D. R., Jackson R. D., Cary J. W., Evans D. D. Soil Water. 1972. Madison, Wisconsin: Published by the American Society of Agronomy. 175p.
Pratt P. F. Nitrate in the unsaturated zone under agricultural lands. Research and Monitoring, EPA Water Pollution Control Research Series 16060 DOE 04/72. 1972. Washington, D.C.: U. S. Govt. Printing Office. 45p. 20402
Pratt P. F., Jones W. W., Hunsaker V. E. Nitrate in deep soil profiles in relation to fertilizer rates and leaching volume. Jour. Env. Qual. 1972. 1:97-102. DOI: 10.2134/jeq1972.00472425000100010024x [CrossRef]
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