Effect of variety, planting density, and fertilizer on the yield and the relative competitive ability of intercropped maize and cassava

Abstract

Different stands of two each of contrasting maize (Zea mays L.) and cassava (Manihot esculenta Cranz) varieties were established as intercrops in experiments at Fumesua and Kwadaso near Kumasi (60 43' N, 10 36' W), from 1986 to 1989. The objective was to identify the factors that play crucial role as determinants of yield of maize and cassava grown as intercrops. Genotype, planting density, and fertilizer application proved important in the performance of both intercrops. Each intercrop had a depressive effect on the other, maize being about two and half times more competitive than cassava. Interspecific superiority was, however, not constant for variety, planting density, and fertilizer application. Suitable combinations of genotypes of maize and cassava are suggested based on land equivalent ratio (LER) and competitive ratio (CR) values and suitable planting densities of the intercrops recommended.


Ghana Jnl.agric. Sci Vol.32(1), 1999: 109-122