Effects of Sesbania rostrata on Rice Planting Methods and Yields of Jackbean (Canavalia ensiformis) after Rice in Saline Soils   Pirach Pongwichian Somsri Arunin Yuttachai Anulaxtipun and Pramote Yamklee   ABSTRACT        The use of Sesbania rostrata as green manure for rice was conducted in saline soil at Ban Thabo, Tawatchaburi, Roi-Et province during 1991-1993. Two rice varieties of RD 15 and KDML 105 were planted by transplanting and dry seeded methods with and without S. rostrata plantation under 2 x 2 x 2 factorial in RCBD. Biomass and N-accumulation of Sesbania, yield and yield components of rice were recorded. After rice harvesting. Jackbean was planted. Biomass and yield were recorded also.      The results showed that S. rostrata planted for dry seeded method and for transplanting method gave high biomass and N-accumulation. However, growth of Sesbania depended on distribution and amount of rainfall. Utilization of S. rostrata showed higher rice yield 46 % over control treatment. The dry seeded method gave higher rice yield than those of transplanting method. The difference of rice varieties was not found. And it found that dry seeded method with S. rostrata gave higher rice yield than those of transplanting method with Sesbania. However rice yield varied with distribution and amount of rainfall. For Jackbean after rice, it showed that Jackbean could grow and survive under saline soil and drought condition with complete growth.        Keywords : Sesbania rostrata, transplanted rice, dry seeded rice, saline soil