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The Interaction of Phosphorus with the Phytotoxicity of Soil Applied Herbicides

  • R. P. Upchurch (a1), G. R. Ledbetter (a2) and F. L. Selman (a1)

Abstract

The interaction of soil applied phosphorus and soil applied herbicides was investigated in field, greenhouse and controlled environment chamber studies. A previously reported diuron-phosphorus interaction could not be repeated under all conditions studied. Amitrole was consistently more toxic to plants grown under high phosphorus levels than under low phosphorus conditions. The phytotoxicity of ten other herbicides was not influenced by the phosphorus content of the soil.

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1. Bingham, S. W., and Upchurch, R. P. 1959. Some interactions between nutrient level (N, P, K, Ca) and diuron in the growth of cotton and Italian ryegrass. Weeds 7:167177.
2. Good, Norman E. 1961. Inhibitors of the Hill reaction. Plant Physiol. 36:788803.
3. Mauney, J. R. September, 1959. The construction of controlled environment chambers from standard walk-in refrigerators. U.S.D.A. Agr. Res. Service. CR-45-59.
4. Minshall, Wm. Harold. 1957. Influence of light on the effect of 3-(p-chlorophenyl)-1,1-dimethylurea on plants. Weeds 5:2933.
5. Upchurch, R. P. 1958. The influence of soil factors on the phytotoxicity and plant selectivity of diuron. Weeds 6:161171.

The Interaction of Phosphorus with the Phytotoxicity of Soil Applied Herbicides

  • R. P. Upchurch (a1), G. R. Ledbetter (a2) and F. L. Selman (a1)

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