Institution: | 1.Faculty of Environmental Studies, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia ;2.Institute of Plantation Studies, 43400 UPM, Serdang, Selangor, Malaysia ;3.Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia ; |