Wijesekara, U.A.D.S.L.; Kottearachchi, N.S.; Dahanayaka, B.A.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Perera, K.G.T.T.; De Silva, D.P.D.C.; Rathnayake, N.R.M.K.N.D.; De Silva, S.N.T.; Senaratne, S.G.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)