PLOW BOTTOMS 



119 



The furrow slice shown in the illustration on page 118 cut farther 

 forward. The plow bottom forces the furrow slice against it in such a 

 way that the complete furrow slice taJ^es on the curvature of the mould- 

 board. This means a rearrangement of the soil particles from the top 

 of the furrow slice to the bottom. 



Another way for determining the relative draft of the 

 share and mouldboard is to remove the mouldboard from 

 the plow, then start the plow in a furrow the proper 

 width and depth previously prepared with the end of 

 the furrow slice cut squarely, and the furrow wall the 

 depth of the furrow far enough ahead for the experiment. 

 A. dynamometer will show the relative lifting work done 

 by the point and wing of the share. The plow must 

 stop as soon as the earth has been lifted the height of 

 the share. 



Putting the mouldboard back on the plow, and lifting 

 the furrow slice which has been measured the proper 

 width and cut the full depth until it is ready to drop into 

 position, will obviously determine the amount of work 

 required by the share and mouldboard. Subtracting 

 the difference between this amount and that required by 



