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Losses of Atrazine in Runoff Water and Soil Sediment
Author(s) -
Hall J. K.,
Pawlus M.,
Higgins E. R.
Publication year - 1972
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1972.00472425000100020015x
Subject(s) - atrazine , loam , surface runoff , soil water , sediment , environmental science , hydrology (agriculture) , agronomy , zoology , pesticide , soil science , geology , biology , ecology , geotechnical engineering , paleontology
Atrazine losses in runoff water and soil sediment were determined in 1967 and 1968 after seven rates (0, 0.6, 1.1, 2.2, 4.5, 6.7, and 9.0 kg/ha) of atrazine were applied pre‐emergent to corn (Zea mays L.) seeded on field plots of Hagerstown silty clay loam (14% slope). Average losses for all rates in 1967 in runoff water and soil sediment equaled 2.4% and 0.16% of the total applied, respectively. In 1967, at the recommended rate (2.2 kg/ha) for pre‐emergence applications to Pennsylvania soils, composite losses were 2.5% of the applied or approximately 0.05 kg/ha. In 1968, one year after atrazine application, the average loss over all rates for the combined substrates was 0.01%. Analyses of soil core samples taken from all plots in 1967 revealed that 1 month after atrazine application an average of 67.9% remained in the soil, and 3 months later recoveries had decreased to 21.4% of that applied. The following year atrazine remaining in the soil had decreased to 15.9% in April and to 5.4% in September. At the recommended rate of application, recoveries decreased from 39% of that applied to 9% for the same time period in 1967. In 1969, typical atrazine toxicity symptoms were found in oats growing on plots which had received 6.7 and 9.0 kg/ha of atrazine in 1967. Damage was confined to the uppermost parts of the slope on these treatments.