Rice breeding and genetics; Application of anther culture technique to rice breeding;
Hybrid rice ; and Rice biotechnology

1965~1967 Military Service
1971~1976 Assistant Rice Breeder, Yeong-nam Crop Experiment Station, RDA
1977~1984 Associate Rice Breeder, Crop Experiment Station, RDA
1984~1994 Rice Breeder, National Crop Experiment Station, RDA
1994~1999 Rice Breeder & Director, Rice Breed. Division, Nat'l Crop Exp't Stn, RDA
2000~2001 Rice Breeder & Director General National Yeong-nam Agricultural Experiment Station, RDA
2002~ Rice Breeder & Director General, National Crop Experiment Stn, RDA
1983~ Editor & Executive Committee of The Korean Society of Crop Science Executive Committee & Vice President of The Korean Breeding Society
1996~ Secretary General & Vice President of Korean Rice Tech. Working Group
1999~2002 Vice President(Editor-in Chief) of The Korean Society of Int'l Agriculture
2002~ Executive Vice President of SABRAO

1977; 1988 Presidential Commendation; Scientific Research Award
1991; 1999 Academic Award & Varietal Award from The Koean Breeding Society
1999 Decoration from Korean Gov't