The Samiano, Arsenio R. creator Upasena, Selawa H. Chairperson Gartner, Joseph A. Examination Committee Sumitra Poovarodom Examination Committee International Development Research Centre, Canada Scholarship Donor text series technical report th Bangkok Asian Institute of Technology 1990 continuing eng 66, [6] p. The agronomic performance of four leguminous green manure s p e c i es ~f.?...?J!a rt ~i <-"!. r-o ~lLsl t c:Lt:.. f.~ .. -""ls_~J_J..{u00A7}ti:.!.l:..fu_ [~.f! __ <;.._tlJ.:..K..€.!El.Y_ and B f;...h .i. n<EJ. we r e evaluated as pre rice green manure on an acid sulphate s oil. Phosporous (triple superphosphate) was basally applied at the rate of 0, 50, and 100 kilograms per hectare respec tively to determine its effect on the growth and d eve lopment of these Ellf.i!.:~fl:L~!.1L ~.. The rice variety RD-23 was transplanted one week after incorporation of green manure. Nitrogen fertiliz er was topdressed at the rate of 0, 20, 40, and 80 kilograms p e r hectar e to determine the response of rice crop to added inorganic N fertilizer. The results show that all the species of green manure wer e photosensitive and flowered 35 days after emergence. Significant differences were observed on some agronomic characteristics. With added P, the plants were taller, more nodule s were produced, and highe r biomass was obtained than from the control. No s ignificant differences was obtained ·in any paramet e r as the rate of application of P was increased from 50 to 100 kilograms per hectare. Biomass production was greatly affected by date of planting of green manure. Green manure planted in March has a higher biomass produced than those planted in November, and their N accumulation in all the species was hig h. With added inorgani c N, the grain yield, the weig ht of 1,000 grains, tiller number and straw yield were increased .This relationship was found to be linear a s the rate of applied N is increased. The grain yield, the straw yield, and the plant heights were significantly higher with 80 kg of N applied . The N and P uptake increased in both the rice grain and the straw with increased levels of applied P and N . However, higher N and P uptake was observe d in the grain than in the straw. A thesis submitted in partial fulfilment of the requirements of the degree of Master of Science, School of Environment, and Development Thesis (M.Sc.) - Asian Institute of Technology, 1990 Rice Research Fertilizers and manures Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B18284 http://203.159.5.9/ait-thesis/detail.php?q=B18284 111005 20260817161957.0