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Soil factors influencing atrazine sorption: Implications on fate
Author(s) -
Novak Jeffrey M.
Publication year - 1999
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620180808
Subject(s) - atrazine , sorption , soil water , environmental science , tillage , simazine , weed control , environmental chemistry , hydrology (agriculture) , agronomy , soil science , pesticide , chemistry , geology , biology , geotechnical engineering , organic chemistry , adsorption
The effects of two soil properties—soil organic carbon (SOC) content and landscape position—and a management factor (tillage) from Iowa and South Carolina soils on the sorption of the herbicide atrazine (6‐chloro‐ N ‐ethyl‐ N ǐ‐(1‐methylethyl)‐1,3,5‐triazine‐2,4‐diamine) were evaluated to assess their influence on atrazine fate in the soil environment. In both Iowa and South Carolina, the magnitude of atrazine sorption was strongly and positively correlated with SOC, landscape position, and tillage. Landscape position was especially important for Iowa soils because SOC‐enriched depressional areas (potholes) on the Wisconsin glacial surface could sorb more atrazine than soils in sloping positions. Our data suggest that herbicide management strategies such as application rates or herbicide selection will require some adjustments to account for the effects of SOC, landscape position, and tillage management on herbicide sorption in to augment effective weed control and prevent herbicide movement to groundwater.