THE TRACTOR PLOW HITCH 175 



The last four furrows were turned with the plow out of adjustment. 

 Notice the ground is broken and pushed to one side. Compare this with 

 the rest of the plowed field with the plow in adjustment. This picture 

 furnishes the best of evidence that a plow should be in the correct line of 

 draft if the operator desires to do good wor^. 



This fact brings up an interesting study of side draft, 

 because the results of such adjustments seem to be con- 

 trary to what one would expect. The reason for this 

 unexpected result lies in the fact that the draft bar 

 attachment from a tractor to the plow is rigid on the 

 plow and hinges to the tractor. Every man who has 

 operated a horse plow knows that to make a right-hand 

 plow take less land the horizontal hitch is moved to the 

 left of the center line of draft, and if he desires to take 

 more land he moves it to the right of the center of draft. 

 He also knows that the pivot point is on the clevis of the 

 plow and not on the shoulders of the horses which repre- 

 sent the center of power the same as the hitch on the 

 tractor, hence there is an entire reversal of the order of 

 hitch. One cannot expect to get the same results 

 because there is a vast difference in the application of 



