Agriculture 412 Forests and forestry 147 Economic aspects 143 History 133 Soils 93 Research 76 Agricultural innovations 71 more ... Forest management 70 Forest policy 67 Hunting 64 Social aspects 63 Agriculture and state 47 Agricultural extension work 45 Irrigation 40 Management 38 Field crops 37 Agricultural geography 36 Fisheries 36 Fertilizers 35 Agricultural productivity 34 Livestock 30 Citizen participation 29 Social forestry programs 29 Soil conservation 29 Forest conservation 28 Rice 27 Rural development 27 Sustainable agriculture 26 Economic conditions 25 Food supply 25 less ...