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- Title
Movement of Diuron and Hexazinone in Clay Soil and Infiltrated Pond Water.
- Authors
Prichard, Terry; Troiano, John; Marade, Joe; Guo, Fengmao; Canevari, Mick
- Abstract
This article focuses on the movement of diuron and hexazinone in clay soil and infiltrated pond water. Movement of pesticide residues from agricultural applications to ground water has been well documented. In California, the approach to regulation of pesticides detected in ground water is to allow continued use if management practices can be identified that mitigate the threat of contamination. On coarse-textured sandy soils, guidelines for irrigation management have been suggested to minimize movement of residues lost to deep percolation. In contrast, low infiltration rates in areas with hardpan soils result in runoff of residues so improved incorporation of pre-emergence herbicides into the soil is recommended to reduce concentrations in runoff water. These two scenarios are not inclusive of all geographical settings where residues have been detected in California's ground water. A study was conducted within an alfalfa field located near Tracy, California, and near a domestic well where hexazinone residues had been detected. The soil mapping unit was a Capay clay, which is a fine, smectitic, thermic Typic Haploxerert and determined to be a cracking-clay in the Xerert dominant suborder.
- Subjects
CALIFORNIA; GROUNDWATER pollution; CLAY soils; HEXAZINONE; DIURON; HERBICIDES
- Publication
Journal of Environmental Quality, 2005, Vol 34, Issue 6, p2005
- ISSN
0047-2425
- Publication type
Article
- DOI
10.2134/jeq2004.0253