. Bulletin of the Department of Agriculture. Agriculture; Agriculture. UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 997. JZ&'&j-u •ijyV Joint Contribution from the Office of Farm Management and *Vif " ii? Farm Economics, H. C. TAYLOR, Chief; Bureau of Public ?S Roads, THOS. H. MacDONALD, Chief; and Bureau o f ^Vr^"^\SL Animal Industry, JOHN R. MOHLER, Chief. Washington, D. C. December 21, 1921 THE COST AND UTILIZATION OF POWER ON FARMS WHERE TRACTORS ARE OWNED. 286 Farms—Ohio, Indiana, Illinois—1920. By H. R. Tollet, Agricultural Engineer, and L. A. Rbynoldson, J
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 997. JZ&'&j-u •ijyV Joint Contribution from the Office of Farm Management and *Vif " ii? Farm Economics, H. C. TAYLOR, Chief; Bureau of Public ?S Roads, THOS. H. MacDONALD, Chief; and Bureau o f ^Vr^"^\SL Animal Industry, JOHN R. MOHLER, Chief. Washington, D. C. December 21, 1921 THE COST AND UTILIZATION OF POWER ON FARMS WHERE TRACTORS ARE OWNED. 286 Farms—Ohio, Indiana, Illinois—1920. By H. R. Tollet, Agricultural Engineer, and L. A. Rbynoldson, Junior Farm Economist. CONTENTS. Introduction 1 Summary 2 Areas in which investigation was made 5 Size and age of tractors 9 Workstock 10 Size of farm 11 Size of farm and size of tractor 12 Workstock on farms of different sizes 12 Work done by tractors 13 Drawbar work 15 Belt work 24 Custom work 25 Work done by horses 26 Horse labor equivalent of tractor work. 34 Proportion of work done by horses and by tractors 35 Number of workstock used on different opera- tions 37 Cost of keeping work stock 39 Cost of using tractors 45 Reliability of tractors 53 Cost of power for different operations as fur- nished by horses and by tractors 54 Annual cost of power for drawbar work 54 Changes in size of f arm and number of work- stock after purchase of tractors 56 Increase in investment due to purchase of tractors 59 Saving of man labor due to use of tractors 60 INTRODUCTION. During October and November of 1920 the Bureau of Animal Industry, the Office of Farm Management and Farm Economics, and the Bureau of Public Roads of the United States Department of Agriculture-made an investigation of the cost and utilization of power on representative farms where tractors are owned in Ohio, Indiana, and Illinois. Two hundred and eighty-six farmers in these States who had been using tractors for a year or more were inter- Note.—Special credit is due to W. R. Humphries, Bureau of Public Roads, f
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