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Making Herbicide Rate Recommendations Based on Soil Tests

Published online by Cambridge University Press:  12 June 2017

Jerome B. Weber ,
M. Ray Tucker  and
Robert A. Isaac
Jerome B. Weber
Affiliation:
Crop Sci. Dep., North Carolina State Univ., Raleigh, NC 27695-7620
M. Ray Tucker
Affiliation:
Agronomic Div., North Carolina Dep. of Agric, Raleigh, NC 27611
Robert A. Isaac
Affiliation:
Univ. Georgia, Athens, GA 30601
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Abstract

Percent soil organic matter content, as determined by standard chromic acid oxidations, was highly (r = 0.89) correlated with soil humic matter content, as determined by NaOH/DTPA (diethylenetriaminepenta-acetic acid)/alcohol extraction of 201 U.S. soils. Humic matter content of the soils was equally or better correlated (r = 0.89 to 0.97) with herbicide bioactivity, as measured in field experiments, than was percent organic matter content (r = 0.87 to 0.92). Regression equations provided allow herbicide rate recommendations for 80% weed control to be calculated based on soil humic matter or soil organic matter levels.

Keywords

Alachlorbutralinmetolachlormetribuzintrifluralinhumic matterorganic matterweed control
Type
Research
Information
Weed Technology , Volume 1 , Issue 1 , January 1987 , pp. 41 - 45
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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