Agriculture 1,375 Economic aspects 1,341 Agriculture and state 170 Agricultural economics 108 Agricultural Economics 105 Congresses 104 Periodicals 88 más ... Agricultural industries 79 Food supply 74 Rural development 53 Produce trade 51 Economic conditions 49 Statistics 43 Environmental aspects 37 Economic policy 36 Food industry and trade 34 Farm management 33 Mathematical models 32 Research 32 Rural conditions 32 Farm produce 31 Sustainable development 31 History 30 Marketing 28 Agricultural productivity 26 Addresses, essays, lectures 25 Agricultural innovations 25 Case studies 25 Social aspects 25 Development Economics 23 menos ...