20 BULLETIN 757, U. S. DEPARTMENT OF AGRICULTURE. 
The binder (fig. 13) is one of the most complicated and most 
expensive implements used on grain farms. Those used in North 
lic. 11.—The grain drill is one of the essential large implements on the grain farm. 
Dakota are usually of from 6- to 8-foot cut. In nearly all cases four 
horses are used on this implement, but occasionally three are used. 
Fic. 12.—A subsurface packer that makes a firm seedbed and breaks the clods, leaving 
a dust mulch. 
It is not uncommon for a farmer to allow the binder to stand in the 
open during the year, the canvases being removed and placed under 
cover. While this practice increases the rate of depreciation to some 
