Agriculture Economic aspects 410 History 251 Economic conditions 108 Agriculture and state 84 Food supply 69 Rural conditions 62 Máis ... Land tenure 56 Social conditions 51 Peasants 49 Environmental aspects 42 Social aspects 37 Politics and government 31 Farm life 21 Farms 20 Food industry and trade 19 Sustainable agriculture 19 Food 18 Rural development 18 Social life and customs 17 Economic policy 15 Human ecology 15 Population 15 Agricultural innovations 14 Farmers 14 Land reform 14 Agricultural industries 13 Commerce 13 Country life 13 Land use 13 menos ...