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EFFECT OF DICHLORO DIPHENYL TRICHLORO-ETHANE (DDT) ON SYMBIOSIS OF RHIZOBIUM SP. WITH PHASEOLUS AUREUS (GREEN GRAM)

R. P. PAREEK and A. C. GAUR
Plant and Soil
Vol. 33, No. 2 (October 1970), pp. 297-304
Published by: Springer
Stable URL: http://www.jstor.org/stable/42932776
Page Count: 8
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EFFECT OF DICHLORO DIPHENYL TRICHLORO-ETHANE (DDT) ON SYMBIOSIS OF RHIZOBIUM SP. WITH PHASEOLUS AUREUS (GREEN GRAM)
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Abstract

The effect of varying concentrations of DDT was studied on growth, nodulation, yield, leghaemoglobin content of nodules and nitrogen uptake of Phaseolus aureus inoculated with Rhizobium sp. Normal doses and even ten times more than those were not deleterious to any of the above characters but 40 ppm and higher levels were significantly harmful. Addition of 1 per cent organic matter appreciably reduced the toxic action of the insecticide.

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