This study was carried out to investigate the production efficiency of organic roughage for organic animal husbandry. Field experiment was conducted during 2000-2002 at National Livestock Research Institute in Suwon. Different set of production system tested such as: standard system(applied chemical fertilization), integrated system(50% reduced chemical fertilization and applied 50% organic fertilization) and organic system(applied only organic fertilization). The results were as fellows : ｏ Average dry matter yield of standard production was higher than that of organic production system by 14%. The increment was slight compare to the forage corps. ｏ There was no significant difference in Nutritive value and the percentage of grasses coverage affected by production system.