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Some Effects of 2,4–Dichlorophenoxyacetic Acid upon Azotobacter as Measured by Respiration Inhibition
Published online by Cambridge University Press: 12 June 2017
Extract
During recent years the increasing use of herbicides for the control of weeds in croplands has stimulated interest in the effect of these chemicals upon the soil microflora. In 1953 Hoover and Colmer (4) showed that the application of 2,4–D to Sharkey sugarcane soil in concentrations comparable to that used in the field had little effect upon the bacteria, actinomycetes, and fungi of this soil. Colmer (1), using the Winogradsky soil plaque technique which can serve to gauge the effect of herbicides upon the nitrogen-fixing genus Azotobacter in their natural habitat, found that field application rates were not harmful to A. chroococcum, and it was only when prohibitive rates of application of 2,4–D (400–600 ppm) were used that growth was markedly affected.
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- Research Article
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- Copyright © 1956 Weed Science Society of America
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