. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN OF THE mHOFAfflCOlHl No. 174 Contribution from the Bureau of Plant Industry, Wm. A. Taylor, Chief April 15, FARM EXPERIENCE WITH THE TRACTOR. By Arnold P. Yerkes, Scientific Assistant, and H. H. Mowry, Assistant Agricul- turist, Office of Farm Management. CONTENTS. Introduction 1 Designation of tractors 2 Steam and gas tractors 3 The gas tractor and the horse 4 Tractor ratings 5 Source of data 6 Observations of business men 7 Opinions of tractor owners 8 Reports of satisfied and dissatisfied 10
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN OF THE mHOFAfflCOlHl No. 174 Contribution from the Bureau of Plant Industry, Wm. A. Taylor, Chief April 15, FARM EXPERIENCE WITH THE TRACTOR. By Arnold P. Yerkes, Scientific Assistant, and H. H. Mowry, Assistant Agricul- turist, Office of Farm Management. CONTENTS. Introduction 1 Designation of tractors 2 Steam and gas tractors 3 The gas tractor and the horse 4 Tractor ratings 5 Source of data 6 Observations of business men 7 Opinions of tractor owners 8 Reports of satisfied and dissatisfied 10 Gasoline and kerosene tractors 18 Fuel supply 20 Fuel consumption 21 Lubricating oil 23 Cross section of plows drawn and area plowed by tractors 23 24 Combination work 25 Depth of plowing 26 Packing soil by tractors 27 Comparison of different sizes of tractors 2S Size of farm 30 Use of tractors at night 33 Custom work 34 Repairs 35 Displacement of horses by tractors 37 Conditions essential to success with the tractor 39 Summary 41 INTRODUCTION. Modern agriculture requires an enormous amount of power to per- form the annual farm operations, and there is a continuous, potential demand for any device that will afford cheaper and more convenient power on the farm. This situation has stimulated the production of many types of mechanical substitutes for the farm horse. Although mechanical power outfits for farm operations have been used in large and increasing numbers for several years, there have been very few reliable data available to the public on the perform- ance of these outfits under ordinary service conditions. Much of the information which has been offered has originated from sources which would indicate that the presentation of the subject would be a biased one or has been furnished by men who were obtaining good, perhaps Note.—This bulletin is intended to make available to farmers who contemplate buying a tractor the experience of many other farmers who have already us
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