Case studies 2,104 Research 491 Oil palm 445 Study and teaching 379 Aerial photographs 266 Analysis 266 Rice 259 more ... Environmental aspects 251 Diseases 239 English language 230 Economic aspects 216 Diseases and pests 210 Growth 190 Malay language 181 Management 172 Soils 164 Fertilizers 161 Palm oil 161 Feeding and feeds 144 Design and construction 141 Food 140 Social aspects 125 Psychological aspects 112 Data processing 111 Study and teaching (Secondary) 105 Water 103 Genetics 102 History 102 Synthesis 100 Foreign speakers 97 less ...