Disaanayaka, D.M.S.; Kottearachchi, N.S.; Weerasena, O.V.D.S.J.; Peiris, W.A.M.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Rajapakshe, B.N.K.; Wickramaarachchi, W.A.R.T.; Kottearachchi, N.S.; Dissanayake, D.M.K.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Ranasinghe, B.M.C.M.; Sumanasena, H.A.; Amarakoon, A.M.E.S.; Lakmali, W.A.S.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)