The effect of distance from interface on growth of pigeonpea is presented inTable 2. Because the growth of pigeonpea was similar at the interface rows(I) of blocks and strips, the values were combined. Similarly the values forthe middle of the strip and third row of the block treatment were combined.The ninth row (N) in the block treatment was the least productive in the firstyear but by the second year there was no significant difference between thethird, sixth and ninth rows in terms of grain yield. In the first year, the Nplants were taller than the I plants because the chickpea plants were short(30 cm) and did not compete strongly against the I pigeonpea whereas therewas considerable mutual shading in the N row. At the end of the secondyear, differences between the I and N plants had widened in grain yield from1.48 to 3.46 times and in stem diameter from 1.16 to 1.43 times.