Madras Agricultural Journal
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Effect of Selected Pre-Emergence Herbicides on the Nodulation and Nitrogen Fixation of Soybean

Abstract

Legume nodulation is one of the important soil processes liable to be adversely affected by the application of herbicides. In the present study, five pre-emergence herbicides viz., methabenzehiazuron (1.0 and 2.0 kg/ha), fluchloralin (1.5 and 2.5 kg/ha), bentazon (1.0 and 2.0 kg/ha), alachlor (1.5 and 2-5 kg/ha), and chloramben (1.0 and 2.0 kg/ha) were tested under field conditions to know their effect on nodulation and nitrogen fixa- tion of soybean Inoculated with a composite culture of Rhizobium japonicum. None of these herbicides was found to have any significent effect on nodule number and dry weight, and dry weight of the plant top.

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