Analysis of total dry matter production (TDM) of annual crops at various distances from the interface showed that chickpea at 0.5 m was severely affected from 40 days after sowing of chickpea whereas crop at 2.5 m away.5 m away was only influenced after 80 DAS (Fig. 4a).At maturity chickpea growth at 0.5 m was reduced to 21% compared to the chickpea at 4.5 m.In the following rainy season sunflower growth at 0.5 m was also greatly reduced(to 48%) but there was no difference in growth at 1.5 m and 2.5 m distance away from the interface (Fig. 4b). Shading by the dense canopy of the I pigeonpea may account for the reduction in sunflower growth and the effect was observed as early as 40 DAS. The most drastic reduction in annual crop was evident in the post-rainy season when chickpea growth was reduced to 8% of sole crop at 0.5 m and extending to 2.5 m away from the interface.(Fig. 4b).