Intercropping of Grain Legumes in Sorghum
Biru Amedie, S.M. hiremath, B.M. Chittapur, S.I. Halikatti, V.P. Chimmad
Abstract
A field experiment was conducted on medium deep black soil during kharif 2001 to study intercropping of grain legumes in sorghum under rainfed conditions. The experiment was laidout in RCBD with three replications. Frech bean, cowpea, soybean, blackgram and groundnut were grown as intercrops in 1:2 row proportion with wider spaced (S2-90 cm x 5 cm) sorghum genotypes (DSH-3 and DSV-2). Sole sorghum with normal planting geometry (S1-45 cm x 10 cm) was also included for comparison. Among the cropping systems, sole sorghum with S1 and S2 planting geometries recorded higher yield than sorghum intercropped with different legumes. However, sorghum intercropped with French bean, soybean and blackgram were comparable with sole sorghum. Among the combinations, sole DSH-3 (S2) produced significantly higher grain yield and was comparable with DSH-3 (S2) intercropped with French bean, soybean and blackgram and DSV-2 (S2) intercropped with soybean. Among the intercrops, significantly higher grain yield was recorded by soybean intercropped with DSV-2 (S2), followed by soybean intercropped with DSH-3 (S2) and Frech bean intercropped with DSV-2 (S2). The economic analysis of the system revealed that intercropping of sorghum + Frech bean/soybean recorded significantly higher net returns and B:C ratio than other cropping systems. Among the combinations, significantly higher net returns and B:C ratio were recorded in DSV-2 (S2)+ Frech bean and DSV-2 (S2)+ soybean than other combinations.
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