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The Influence of Soil Organic Matter on the Phytotoxicity of Herbicides

Published online by Cambridge University Press:  12 June 2017

R. P. Upchurch  and
D. D. Mason
R. P. Upchurch
Affiliation:
Field Crops, North Carolina State College
D. D. Mason
Affiliation:
Experimental Statistics, North Carolina State College
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Abstract

The toxicity indices to cotton of 12 soil-incorporated herbicides were highly and positively correlated with soil organic matter, cation exchange capacity, exchangeable calcium, moisture equivalent, free drainage value and total exchangeable bases. The characteristics of the responses indicate that adsorption of the 12 herbicides on organic matter occurs and that this greatly affects their toxicity. For equal toxicity approximately five times more herbicide was required at 20% organic matter than at 4% regardless of the herbicide involved.

Type
Research Article
Information
Weeds , Volume 10 , Issue 1 , January 1962 , pp. 9 - 14
Copyright
Copyright © 1962 Weed Science Society of America 

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References

Literature Cited

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