Agriculture Economic aspects 84 Rural development 16 Agriculture and state 15 Research 14 Agricultural innovations 9 Economic conditions 9 Economics 9 Food supply 9 History 9 Land tenure 5 Peasants 5 Technology transfer 5 Case studies 4 Environmental aspects 4 Rural conditions 4 Rural poor 4 Social conditions 4 Agricultural credit 3 Agricultural ecology 3 Agricultural productivity 3 Congresses 3 Government policy 3 Green Revolution 3 Land reform 3 On-farm 3 Social aspects 3 Statistics 3 Agricultural development projects 2 Agricultural industries 2