Malaysia 18 Palm oil 12 Forestry 7 Agriculture 6 Elaeis 5 Sustainable development 5 Oil palm 4 Oil palm plantations 4 Surveys 4 plantation 4 Agricultural robots 3 Antennas 3 Economics 3 GIS 3 Geographic information systems 3 Precision agriculture 3 Remote sensing 3 Soils 3 Surveying 3 Unmanned aerial vehicles (UAV) 3 Vegetation 3 biomass 3 nonhuman 3 Agricultural conservation 2 Agriculture and the environment 2 Article 2 Artificial neural network 2 Biophysical parameters 2 Bipolaris oryzae 2 Classification 2