Herbicide residues in California agricultural soils
Authors AffiliationsA. 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.
Hilgardia 22(8):2-4. DOI:10.3733/ca.v022n08p2. August 1968.
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.
Also in this issue:Sudangrass greenchop yields reduced by wheel damage during harvesting
Research with nitrogen fertilizer emphasizes fertilize crop—not crop residue
Comparison of three commercial drain tiles in a heavy clay soil of Imperial Valley
Carbamate herbicides—new tools for cytological studies
Magnesium deficiency in cut-flower chrysanthemums
Phosphorus deficiency decreases stomatal activity and water use of plants
Pricing efficiency in the manufactured dairy products industry