Challenges to food production in the mahaweli area "H" - Upasna, S.H..Copping systems Division.Regional Agricultural Research Center,Maha Illuppallama; Jayawardena, N.S..Copping systems Division.Regional Agricultural Research Center,Maha Illuppallama (Proceedings of the 37 Annual Session,Part I-Abstrascts, 1981)
Keywords: Agricultural Sciences and Forestry; -