272 BULLETIN 226. 



Hogs frequently do considerable damage to the trees, particularly if the 

 feed-yard is in the orchard. Around the place where they are fed they 

 rub the trunks and roots, pack the soil so as to make it impervious to 

 air, and sometimes bark the trees. It is well to remember that one good 

 apple-tree is worth more than a hog, and that a small strip of bark 

 removed will usually result in a decayed tree. There should always be 

 a feed-yard outside the orchard. 



Hogs or sheep do considerable good by eating the apples that fall 

 early, and so disposing of many worms. 



None of the methods of sod treatment equal tillage in average yields. 

 A comparison of Table 12 with Table 10 shows the force of this statement. 



