Dewagedara, D.M.A.E.I.; Wijesinghe, S.A.E.C.; Rathnayake, R.H.M.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Madhushani, P.V.N.; Wijesinghe, S.A.E.C.; Attanayaka, D.P.S.T.G.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Perera, W.S.C.; Hewajulige, I.G.N.; Wijeratnam, W.S.; Ratnayake, R.H.M.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)