Agriculture Economic aspects 394 History 226 Economic conditions 90 Agriculture and state 79 Rural conditions 61 Food supply 54 more ... Peasants 52 Land tenure 50 Social conditions 43 Rural development 28 Social aspects 28 Environmental aspects 26 Antiquities 23 Politics and government 23 Social life and customs 23 Land reform 21 Agricultural laborers 17 Food 17 Produce trade 17 Agricultural innovations 16 Origin 16 Farmers 15 Land use 15 Description and travel 14 Sustainable agriculture 14 Manners and customs 13 Slavery 13 Economic policy 12 Farm life 12 less ...