Genotypic compatibility and spatial arrangements in spring sunflower and greengram (Phaseolus radiatus) intercropping

The field experiment was conducted during spring/summer season of 1995 and 1996 on sandy loam soil at Research Farm of Indian Institute of Pulses Rese arch, Kanpur. Three genotypes of greengram (Phaseolus radiatus L.), ie 'PDM 11', 'PDM 84-139' and 'PS 16' were intercropped with 'Morden' sunflower (H elianthus annuus L.) in 4:1, 6:1 and 6:2 row ratio (greengram : sunflower). Highest seed yield of greengram genotypes as well as of sunflower was reco rded in their respective sole stand which reduced considerably with intercr opping. The total productivity of the system and land-use efficiency increa sed considerably under intercropping. The highest mean sunflower equivalent yield (1 726 kg/ha) and land equivalent ratio (1.19) was recorded from int ercropping of 'PS 16' greengram with sunflower in 6:2 row ratio.