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Decomposition of Carbon‐14 Labeled Atrazine in Soil Samples from Sanborn Field
Author(s) -
Wagner G. H.,
Chahal K. S.
Publication year - 1966
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1966.03615995003000060027x
Subject(s) - atrazine , incubation , soil water , chemistry , decomposition , phleum , environmental chemistry , agronomy , incubation period , organic matter , pesticide , biology , ecology , organic chemistry , biochemistry
Soil samples from corn (Zea mays) and from timothy (Phleum pratense) plots of Sanborn Field, with and without glucose added, were incubated for 6 months after treating with 10 ppm of C 14 ring‐labeled atrazine. During the incubation period, < 2% of the ring carbon of atrazine was evolved as CO 2 from the glucoseamended soils and < 1% from the unamended soils. The rate of C 14 O 2 evolution from the corn soil did not vary greatly throughout the incubation, whereas, for the timothy soil it peaked at 1 week and then rapidly declined. Evolution of CO 2 from glucose and native organic matter was not influenced by the atrazine treatment. Recovery of unchanged atrazine after concluding the incubation averaged about 10% of that initially added. The bulk of the added C 14 was not extracted in the course of making these measurements but its persistence in the soil was confirmed by total combustion.