Premium
Triazine Persistence in Soil in Eastern Ohio 1
Author(s) -
Nearpass D. C.,
Edwards W. M.,
Taylor A. W.
Publication year - 1978
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1978.00021962007000060011x
Subject(s) - simazine , atrazine , mulch , persistence (discontinuity) , tillage , agronomy , triazine , degradation (telecommunications) , weed control , environmental science , growing season , chemistry , soil water , conventional tillage , pesticide , biology , soil science , telecommunications , geotechnical engineering , computer science , polymer chemistry , engineering
Degradation rates of triazine herbicides, following application for weed control, were measured to evaluate their persistence in Eastern Ohio soils under no‐tillage and conventional corn management systems. Atrazine [2‐chloro‐4(ethylamino)‐6‐isopropylamino‐ s ‐triazine] degradation in the field was compared with that found in laboratory measurements on the same soil. The reaction showed first‐order kinetics, but in the field the rate constant varied being faster in summer and slower in the early fall. Simazine [2‐chloro‐4,6‐bis‐(ethylamino)‐ s ‐triazine] degradation in the field showed similar characteristics. Under conventional and no‐till managements both chemicals degraded through three or four half‐lives during the 160‐day growing season. Under similar pH conditions, the presence of a surface mulch did not affect the degradation rate.