D.C. Abeysinghe

Department of Plantation Management, Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, Gonawila (NWP)

S.M.N.K. Wijerathne

Department of Plantation Management, Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, Gonawila (NWP)

R.M. Dharmadasa

Industrial Technology Institute, Bawddhaloka Mawatha, Colombo, Sri Lanka