142 



THE OLIVER PLOW BOOK 



the plow, thus causing greater pressure. Sometimes 

 the coulters should be well forward, particularly when 

 the soil is loose, because the action of the coulter picks 

 up the fine, loose soil. The advanced position permits 

 the earth to drop on the furrow slice sufficiently in 

 advance of the plow bottom to prevent it from falling 

 on the shin. 



Oftentimes turning the plow bottom on its wing will 

 start it to scour. This puts more pressure upon the 

 mouldboard and is a very good thing to do when the 

 trouble is caused by going from wet to dry soils or vice 

 versa. 





The chilled bottom photographed after the experiment illustrated on 

 page 143. Observe there are no scratches on this mouldboard. The 

 dark points on the wing of the share and end of the mouldboard show the 

 high polish that the gritty soils put upon this bottom. 



If it is noticeable, in all these different attempts to 

 make the plow scour, that the earth is being turned over 

 into clods and not pulverized properly, even though the 

 plow does scour for a few feet, the wrong bottom is 

 being used. The wise thing is to get in touch with some 



