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ross v baumann
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The tractor and its effects on farming in Minnesota
Ross V. Baumann · U.S. Dept. of Agriculture, Bureau of Agricultural Economics
27 sayfa · 1940
Farm mechanization / Tractors
Costs, returns and capital requirements for soil-conserving farming on rented farms in western Iowa
Harald R. Jensen, Earl Orel Heady, Ross V. Baumann · Agricultural Experiment Station, Iowa State College
287 sayfa · 1955
Soil conservation / Economic aspects / Farm tenancy