Udadeniya, A.G.S.G.; Amadoru, I.J.; Abeysinghe, D.C.; Gunathilaka, H.A.W.S.; Dharmadasa, R.M.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Siriwadhana, S.K.S.N.; Amarasinghe, K.G.A.P.K.; Abeysinghe, D.C.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)