An investigation was conducted at Bangladesh Sugarcane Research Institute Farm to assess effects of irrigation on yield of potato and sunhamp as 1st and 2nd intercrops with Isd 31 variety of sugarcane by STP polybag settlings. There was remarkable increase in yield of potato, sunhamp and sugarcane by water application. The highest yield of potato, sunhamp and sugarcane obtained were 10.06 t/ha, 16.96 t/ha and 85.50 t/ha in T 3, T 2 and T 3 treatments and of that control treatments yield were 6.94, 12.69 and 71.48 t/ha respectively. Yield of potato, sunhamp and sugarcane reduced due to excess application of water in each T 4 treatment. Therefore, the profitability of intercropping potato and sunhamp with sugarcane significantly did not reduce the yield of the sugarcane compared to the alone cane.
