Field and pot experiments were conducted for the split application of potash in paddy (Oryza satiνa L. cultiνar Jinheung.) Production and the experimentaI resuIts were analysed with regard to the yield of paddy and its yield components. The absence of potash at the reproductive stages such as primodial and heading period but supplied most of the potash at the early growth stages. resulted in an increase of panicles but in a decrease of grain numbers per panicle and yield of paddy. On the other hand. however. the reduced amount of potash application at the earIystage of growth showed a decreased number of panicles and yield of paddy. paticulary where lime and fresh rice straw were applíed.