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Fate and Activity of Herbicides in Soils

Published online by Cambridge University Press:  12 June 2017

R. E. Ogle
Affiliation:
Department of Horticulture, Purdue University Hercules Powder Company, Wilmington, Delaware
G. F. Warren
Affiliation:
Purdue University
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Extract

The fate of herbicides in the soil is of great importance to both research workers developing chemical weed control methods and to growers employing these newer techniques. It is desirable to know whether herbicides applied to the soil will persist and be cumulative so that subsequent crops will be affected, if a short period of residual activity can be expected, or if the compounds are rapidly dissipated. In case of pre-emergence applications where timing is critical and results vary with such factors as soil type, moisture and temperature, the activity and persistence of a herbicide are of great importance. Thus it seemed pertinent to study the effects of soil type, exchange capacity, temperature and amount of rainfall on breakdown, leaching and retention of certain herbicides in the soil. The herbicides used were 2,4–dichlorophenoxyacetic acid (2,4–D), N–1 naphthyl phthalmic acid (NPA), trichloroacetic acid (TCA), 3–(p–chlorophenyl)–1, 1–dimethylurea (CMU) and isopropyl N–(3–chlorophenyl) carbamate (CIPC).

Type
Research Article
Copyright
Copyright © 1954 Weed Science Society of America 

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References

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