Economic aspects 72 Rice 55 Agriculture 45 Periodicals 45 Research 34 Economic conditions 28 Fisheries 22 more ... Case studies 19 Social conditions 18 History 17 Congresses 14 Politics and government 13 Statistics 13 Environmental aspects 12 Marketing 12 Mathematical models 12 Bibliography 11 Fishery management 10 Philippines 10 Coconut industry 9 Economic policy 9 Management 9 Planting 9 Social aspects 9 Agriculture and state 8 Community development 8 Diseases and pests 8 Farmers 8 Law and legislation 8 Agricultural extension work 7 less ...