Hydroponics 37 Nutrient film culture 37 Case studies 33 Shrimp culture 25 Fertilizers 22 Bee culture 21 Corporate culture 21 more ... Social aspects 21 Oil palm 20 Growth 17 Orchid culture 17 Tissue culture 17 Plant tissue culture 16 Orchids 15 Fish culture 14 Mushroom culture 14 Research 14 Honeybee 13 Tomatoes 13 Language and culture 12 Propagation 12 Bees 11 Cross-cultural studies 10 Aquaculture 9 Bok choy 9 Cell culture 9 Cultural property 9 Economic aspects 9 In vitro 9 Lettuce 9 less ...