University of California

Herbicide residues in California agricultural soils


A. Lange
B. Fischer
W. Humphrey
W. Seyman
K. Baghott

Authors Affiliations

A. H. Lange is Weed Control Specialist, Agricultural Extension Service, University of California, Riverside; B. Fischer is Farm Advisor, Fresno County; W. Humphrey is Farm Advisor, Orange County; W. S. Seyman is Farm Advisor, Santa Clara County; K. G. Baghott is Farm Advisor, Modoc-Siskiyou counties.

Publication Information

Hilgardia 22(8):2-4. DOI:10.3733/ca.v022n08p2. August 1968.

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The question of herbicide residues, and possible effects on succeeding crops, is one of great importance to agriculture, particularly with increasing use of such chemicals to minimize hand labor requirements as well as soil compaction from weed cultivation equipment. This study, involving tests with 13 herbicides, used under typical field conditions at six locations in California, showed great differences in residual characteristics. At high rates (approaching four times the amounts normally used for weed control), simazine, bromacil, and trifluralin caused soil residue problems. Location of the tests also affected the amounts of residue for different herbicides.

Lange A, Fischer B, Humphrey W, Seyman W, Baghott K. 1968. Herbicide residues in California agricultural soils. Hilgardia 22(8):2-4. DOI:10.3733/ca.v022n08p2
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