MISCELLANEOUS. 



439 



stirred, and the better the soil was stirred, or as is gen- 

 erally known, pulverized, the larger the crop. Differ- 

 ent devices have been used for pulverizing the ground, 

 but the most common and probably the best one is the 

 plow. 



Plows. There are two general classes of plow, the 

 moldboard and disk plows. 



Moldboard Plows. If plows are all equally sharp 

 and equally well adjusted there will not be any differ- 

 ence in their draft unless the moldboard of one has a 

 more abrupt curve than that of another. Plows with 



Stubble. Black land. General purpose. 



TYPES OF MOLDBOARDS. 



Breaker. 



nearly straight moldboards are used for breaking wild 

 grass sod. The share, which is the cutting edge of the 

 plow cuts the roots of the grass about three and one- 

 half inches beneath the surface of the ground, then the 

 moldboard carefully and smoothly turns the sod upside 

 down. Such a plow is known as a breaker. Plows 



DIAGRAM SHOWING HOW ONE LAYER OF SOIL TENDS TO SLIDE PAST 

 ANOTHER WHILE BEING TURNED BY THE PLOW. 



