Agriculture Economic aspects 284 History 142 Economic conditions 74 Agriculture and state 56 Land tenure 43 Rural conditions 42 المزيد ... Social conditions 40 Food supply 34 Peasants 32 Politics and government 23 Societies, etc 14 Population 12 Farm life 11 Human ecology 11 Rural development 11 Antiquities 10 Land reform 9 Produce trade 9 Research 9 Social life and customs 9 Commerce 8 Economic policy 8 Farms 8 Land use 8 Social aspects 8 World War, 1914-1918 8 Agricultural laborers 7 Country life 7 Farmers 7 أقل ...