Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Effect of maize (Zea mays L.) and soybean (Glycine max (L.) Merrill) intercropping on weed dynamics.

Abstract

This paper presents the results of an experiment conducted in Nagaland, India, during kharif 2011 under rainfed condition to investigate the effect of maize+soyabean intercropping on weed dynamics (weed flora, density, dry matter and weed index). The treatments comprised sole maize, sole soyabean and maize+soyabean at row ratios of 1:1, 1:2, 2:1, 2:2 and 2:3, respectively. The cultivation cost, cost benefit analysis (B:C ratio), gross returns, net returns, harvest index, land equivalent ratio and grain yield were determined. The major weeds identified in the field were Amaranthus viridis, Leucas aspera, Cyperus rotundus, C. iria, Cynodon dactylon, Mimosa pudica, Setaria gauca [S. pumila], Borreria hispida [Spermacoce neohispida], Imperata cylindrica and Digitaria sanguinalis. The results suggested that the paired rows of maize+soyabean (2:2) was the best combination for getting advantage in intercropping when compared with other row arrangements as shown by weed dynamics and favourable economic indices such as net returns and B:C ratio.