102. t %li e .^.THH. OLIVER PLOW BOOK 



that does a perfect job of plowing in soil that is in the 

 proper condition for plowing will be ruinous to this soil 

 when plowing it too wet. 



It is further obvious that those soils which must be 

 plowed when wet require the use of a mouldboard that 

 will break them as little as possible while being turned. 

 This characteristic identifies those types of plow bot- 

 toms used for plowing wet soils that do not have the 

 benefit of the winter's freezing. 



The illustrations of the following plow bottoms will 

 suffice to make clear the efforts being put forth to build 

 bottoms suitable for all conditions. 



Illustration F 



Illustration F shows a steel base, general purpose 

 bottom. By general purpose is meant a plow that will 

 not only plow stubble, but also tame grass sods. The 

 shape of this bottom is such that it scours in a great 

 many varieties of soils. This bottom turns a furrow 

 well over and leaves an even, well crowned furrow top. 

 The types of soil in which this bottom gives the best 

 satisfaction are the sandy and clay loam, and some waxy 

 soils where scouring is a hard problem. This plow 

 bottom is well adapted to heavy loam and gumbo soils, 



