SOILS. GEITEBAL CONSIDBEATIONS. 109 



What these exactly are has been questioned for years 

 past. Whatever the physical or chemical properties 

 of the soils may be, if not ploughed in the proper man- 

 ner to permit the air, etc., to penetrate, they will in all 

 cases give bad results, and even then the variation of 

 the weather and temperature will have the same effect, 

 but these are beyond the control of man, for which he 

 cannot be blamed. 



