A field experiment was conducted at Regional Agricultural Research Station, Bijapur (Karnataka) on medium deepblack soil during kharif season of 2005 to assess the performance of senna (Cassia angustifolia) in cotton, pigeonpea and castor at different row proportions. The treatment consists of cotton, pigeonpea, castor and senna in sole stand as well as intercropping system with two row proportions and pigeonpea + pearlmillet (1:2) intercropping system as a check.Intercropping of cotton, pigeonpea and castor with senna significantly reduced the leaf yield (574.79 kg ha-1), pod yield (221.94 kg ha-1) and stover yield (1024.68 kg ha-1) of senna as compared to the sole crop of senna (952.64 kg ha-1, 357.86 and 1693.88 kg ha-1), respectively. Intercropping of senna with cotton in 1:1 and 1:2 row proportions recorded significantly higher gross returns (` 33,429ha-1 and ` 34,687 ha-1, respectively) and net returns (` 21,271ha-1 and ` 22,529 ha-1, respectively), Land Equivalent Ratio (1.41 and 1.44, respectively,) and Area Time Equivalent Ratio (1.38 and 1.41, respectively,) over other intercropping systems.