Effective weed -free period of common beans in two different agro -ecological zones of Sri Lanka - Premalal, K.P.S.B.; Sangakkara, U.R.; Van Damme, P.; Bulcke, R. (Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1999)
Keywords: Agriculture; Phaseolus vulgaris; Weed management; Panicum maximum