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Influence of Cropping and Activated Carbon on Persistence of Atrazine in Sand

Published online by Cambridge University Press:  12 June 2017

R. G. Harvey
R. G. Harvey*
Affiliation:
Dep. of Agron., Univ. of Wisconsin, Madison, WI. 53706
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Abstract

The persistence of 2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine (atrazine) residues under greenhouse conditions was affected by levels of activated carbon added to a silica sand potting medium and by up to four consecutive crops of corn (Zea mays L.). Degradation of atrazine within the sand and removal by the corn crops were both reduced by activated carbon. Atrazine removal by successive crops of corn reduced injury to oat seedlings grown on the sand alone, and absorption by 1.2 g of carbon per kilogram of sand prevented oat injury both with and without cropping. Although 0.4 g/kg of activated carbon inhibited atrazine removal by corn, oat seedlings were not protected from the residues remaining. When exposed to alternate freezing and thawing, the ability of 0.4 g/kg of activated carbon to deactivate atrazine was reduced causing increased oat injury.

Type
Research Article
Information
Weed Science , Volume 21 , Issue 3 , May 1973 , pp. 204 - 206
Copyright
Copyright © 1973 Weed Science Society of America 

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References

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