Washington, D. C. April 25, 1924 
TRACTORS AND HORSES IN THE WINTER WHEAT BELT 
OKLAHOMA, KANSAS, NEBRASKA 
By 
H. R. TOLLEY, Agricultural Economist 
Bureau of Agricultural Economics, and 
W. R. HUMPHRIES, Assistant in Agricultural Engineering 
Bureau of Public Roads 
CONTENTS 
Description of areas . 
Farms operated with one tractor and horses 
Size and age of tractors 
SNORE oe San 2 Ad's Phd top Riel. alte Gal Nees BRE BAC bY SE 
Work done with tractors 
Work done with horses 
Horse labor equivalent of tractor work 
Proportion of work done with different forms of power 
Work stock needed in addition to tractor 
Cost of keeping work stock 
Cost of using tractors 
Reliability of tractors 
Annual cost of power for drawbar work 
Changes after purchase of tractor 
Owners’ opinions regarding use of tractors 
Farms on which tractors were not owned 
Number of work stock 
Cost of keeping work stock 
Annual! cost of power for drawbar work 
Changes between 1918 and 1921 
Opinions concerning tractors 
Cost of power and man labor for different operations 
Farms on which no horses were owned 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1924 
