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Field experiments conducted to study the influence of environmental conditions on biomass production and yield in two summer mung (Vigna radiata (L.) Wilczek) eultivars PS—7 and PS—16 grown on the sandy loam soils at the Indian Agricultural Research Institute, New Delhi revealed that the modification brought in the microenvironment of the crop through application of wheat straw mulch (6 t/ha) immediately after first irrigation on 20th day resulted in an increase in the above-ground biomass. This ranged from 30 to 36 per cent higher under mulch treatment as compared to the recommended 2-irrigation treatment. Mulch application had also obviated the necessity of providing the second irrigation to the crop on 40th day as recommended at present.
