Influence of maize zea mays crop residue and nitrogen on the productivity and economics of maize plus soybean glycine max intercropping under paired system of planting

Venugopal, N.; Shivashankar, K.

Indian Journal of Agronomy 36(4): 502-507


ISSN/ISBN: 0537-197X
Accession: 007457356

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An effect of stover residue of maize (Zea mays L.) and nitrogen levels on productivity and economics of maize + soybean [Glycine max (L.) Merr.] under paired row system of planting maize was studied at Bangalore during 1982-83. Intercropping of maize under paired row system of planting was superior to sole cropped maize. Stover @ 4 tonnes/ha reduced the barrenness, improved the test weight and increased the maize yield by about 7 q. Stover application also increased the seed yield of intercropped soybean. The net returns were increased by 1,504 and 1,697 Rs/ha with stover. Nitrogen application increased the number of cobs, grain number and grain weight besides reducing the barrenness, resulting in increased net returns from Rs 3,773 and Rs 2,561 in the control to Rs 10,407 and Rs 8,310 at 80 kg N; and Rs 13,210 and Rs 14,974 at 160 kg N/ha during the winter and rainy season respectively. These in turn increased the maize yield from 2,281 and 887 kg/ha in the control to 5,398 and 3,948 kg at 80 kg N and 7,026 and 7,363 kg at 160 kg N/ha during the winter and rainy season, respectively.