Yield and economics of maize (Zea mays) and soybean (Glycine max) in intercropping under different row proportions

Kumar, K.A.; Reddy, M.D.; Sivasankar, A.; Reddy, N.V.

Indian Journal of Agricultural Sciences 73(2): 69-71


ISSN/ISBN: 0019-5022
Accession: 070560158

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A field experiment was conducted at Regional Agricultural Research Station, Jagtial, Andhra Pradesh, during the rainy seasons of 1995, 1996 and 1997, to find out the appropriate row ratio and plant population proportion of maize (Zea mays L.) and soybean [Glycine max (L.) Merr.] intercropping system under rainfed conditions of northern Telangana, Andhra Pradesh. Maize and soybean were intercropped in 1: 1, 1:2 and 1:3 row ratios at 100: 100 and 100:50, 100:67 and 100:75% population proportion of respective crops and these intercropping treatments were compared with respective sole crops. Sole cropping of maize was advantageous in terms of maize-equivalent yield (3 471 kg/ha) and net returns (Rs 5 407/ha) than soybean, but economic advantage was more in case of intercropping system (Rs 6 909/ha). The weed growth was significantly lower under intercropping of maize with soybean than the sole crop of maize. Reduction in grain yield of maize and soybean was 13-55% and 47-55%, respectively, under intercropping. However, yield (4 126 kg/ha) and economic advantage (Rs 5 632/ha) were higher with 1:1 row ratio, followed by 1:2 row ratio than that of 1:3 row ratio though weed growth was significantly lower in 1:3 row ratio than that of 1:1 and 1:2 row ratios. Higher mean maize-equivalent yield (4 262 kg/ha), land-equivalent ratio (1.34), net returns (Rs 6 909) and benefit:cost ratio (1.60) were recorded with 1:1 row ratio at 100:50 population proportion than the other intercropping systems.