Arizona republican., 1919-04-13

 of. the Society of Automobile En- gineers and is printed through the courtesy of Pratt Gilbert company, Arizona distributors of Avery motor farming machinery:
 The work of d tractor has become synonymous with farm work and to our mind farm work divides itself, from the standpoint of a farm tractor, into two classes:
 Il. Heavy duty work-breaking ground preparing the seed bed, draw ing heavy loads, transportation over roads. pulling a grain separator and the like.
 % Light duty work-cultivating row crops and doing all the light jobs on the farm ordinarily performed by one to three horses.
 Tn my judgment. an all purpose farm tractor, one to do all the work on the farm, is fundamentally impossible It may be admitted in the outset that all of these jobs may be shot at by one type of tractor, but in my judS- ment they never will be done success fully with one type of tractor, because they can never be economically done and the motorized farm will become a reality only when a farmer IS pro- vided with a power unit for each of the above named or similar classified tions. One does not attempt to haul logs in top buggy nor drive to church on Sunday in a log wagon. The first is wholly impracticable and both are uneconomical. Railroading is a big business, but it is not as big q huai- ness as farming. it's problems of power are less intricate than the problem of power farming. Yet it did not take long Sor railroads to discover and discard the al-purpose locomotive and to classify their work and build their power units accordingly.
 Breaking ground and belt opera tions are the heaviest parts of farm work. To perform this work success fully and economically one must have a tractor with motor that will readily and without strain meet the require ments. The machine must also be built to operate with perfect ease, all the belt driven machinery, which any farmer may have occasion to use and to date there are comparatively few l tractors constructed for successful belt work.
 "The strains and added loads in
 
 and eyerlastingly It is the difference between a steady pull and a succession of jerks or blows and whoever be- lieves the automobile type of motor can stand up under this kind of work should give himself the benefit of the simple experiment of hitching an au- tomobile to one end of a 50 foot cable and a telephone pole to the other. fbpY1 he ophipa of norm cnoad and take up the slack, and do this not once, but repeatedly during every day l for the average number of blowing days a farm tractor is supposed to run.
 Not alone is it necessary for the tractor to do the work efficiently, there remains the big factor of econ omy. Not only does this mean kero- sene, gasoline or oils, but includes as well the answer to these questions How long will the tractor stand up? How many seasons is it good for? How many miles will produce? The ques- l tion of fuel economy is, of course, an l important one 4 fuel cost per acre | plowed at 45 cents is no uncommon l performance. Our experience has | shown that heavy duty type of motor is economical both in fuel consumption l and length of service. Admittedly l this type of motor costs more to manu- | facture than an automobile type high | speed motor of equal horse power.
 The second class of farm work we mention which may be economically | performed with mechanical power is a | much simpler proposition. Here the | light work of d planter, a row crop cultivator and the like requires neither so much power in the motor nor so much strength or weight, hence the | impracticability of combining an all- 1 around tractor. The tractor which l operates on the farm in doing farm 1 work, hauling and cultivating jobs must be geared to too low a speed to afford economy. If you add a high speed motor to your farm tractor you will tend 10 shorten the life of the machine. l do not believe that a com l bination of a tractor for heavy work as of class one and for lighter work such as class two can ever be sue 1 cessful.
 ITO the objection that this method 1 of motorizing the farm requires toe much investment by the farmer. my reply would be that these two power units will entirely supplant the horse | on the farm. The initial cost will be
  more than offset by the saving of tractor fuel over animal fuel and the | life Of the tractor should be greater l than the life of the horse. not taking | into account the saving of man-power and the different uses of the tractor.
 ''To my mind there are several reasons why the farmer must come 1 to the motorized farm. First. farm help shortage, which promises to be worse than better. Second land is becoming so valuable, that no man can l afford to own land unless he farms I it intensively and he can no longer af- ford to devote a material part of his acreage to raising roughage and grair for horses. And finally the food prob lem is not over. It is hardly begun i. It will take years to get the food sup ] ply back 10 normal
 i "One other factor. 1t seems to me is well worth attention. Expcricnc,