Agriculture 30 Economic aspects 22 History 12 Agriculture and state 11 Government policy 9 Agricultural laborers, Foreign 8 Agricultural biotechnology 7 יותר ... Foreign workers, Mexican 6 Labor unions 6 Automobile industry workers 5 Farmers 5 Foreign workers 5 Law and legislation 5 Environmental aspects 4 Family farms 4 Rural conditions 4 Transgenic plants 4 Description and travel 3 Emigration and immigration 3 Farms, Small 3 Frontier and pioneer life 3 Intellectual property 3 Land settlement 3 Plant biotechnology 3 Politics and government 3 Societies, etc 3 Trials, litigation, etc 3 Agricultural colleges 2 Agricultural credit 2 Agricultural education 2 פחות ...