1. Department of Crop Science, Faculty of Agriculture and Food Sciences, Universiti Putra Malaysia, Bintulu Sarawak Campus, Bintulu, Sarawak, Malaysia
2. Agriculture and Environment Department, Borneo Ecosystem Science Research Centre, Faculty of Agriculture and Food Sciences, Universiti Putra Malaysia, Bintulu Sarawak Campus, Bintulu, Sarawak, Malaysia
3. Institute of Tropical Agriculture, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
4. Institute of Tropical Forestry and Forest Product (INTROP), Universiti Putra Malaysia, Serdang, Selangor, Malaysia