Changes in Nitrogen Content of Soil Freshwater and Weed Density under Rice-Duck Farming System

  • Lee Yong-Hwan (National Institute of Agricultural Science and Technology, RDA) ;
  • Lee Sang-Min (National Institute of Agricultural Science and Technology, RDA) ;
  • Sung Jwa-Kyung (National Institute of Agricultural Science and Technology, RDA) ;
  • Kim Young-Ho (National Institute of Agricultural Science and Technology, RDA) ;
  • Choi Du-Hoi (National Institute of Agricultural Science and Technology, RDA) ;
  • Ryu Gap-Hee (National Institute of Agricultural Science and Technology, RDA)
  • 발행 : 2005.08.01