University of California

Evaluation of soil amendments in Imperial Valley


F. E. Robinson
D. W. Cudney
J. P. Jones

Authors Affiliations

Frank E. Robinson is Associate Water Scientist, Imperial Valley Field Station; David W. Cudney is Farm, Advisor, Imperial County; James P. Jones, formerly Farm Advisor, Imperial County, is presently with the Department of Biochemistry and Soils, University of Idaho.

Publication Information

Hilgardia 22(12):10-11. DOI:10.3733/ca.v022n12p10. December 1968.

PDF of full article, Cite this article


Gypsum is added to irrigation water to increase soil intake rates in some areas of California. More than a third of a ton of this compound is already present in each acre foot of irrigation water as it is delivered to farms in the Imperial Valley. Tests were conducted at the Imperial Valley Field Station to determine whether the addition of other soil amendments would increase the soil intake rates. These tests were conducted with three compounds commonly used by growers in the area as soil amendments: calcium polysulfide, ammonium polysulfide, and sulfuric acid. Water treated with these compounds was compared with untreated water in a randomized block design. Only ammonium polysulfide produced a significant increase in soil intake rates.

Robinson F, Cudney D, Jones J. 1968. Evaluation of soil amendments in Imperial Valley. Hilgardia 22(12):10-11. DOI:10.3733/ca.v022n12p10
Webmaster Email: sjosterman@ucanr.edu