LUTHER BURBANK 



on the land for some years, they are replaced by 

 hardwood trees. And so the rotation continues. 



This is not intended to be a complete discussion 

 on the rotation of crops. It is the principles which 

 underlie the practice that are of the most funda- 

 mental importance. 



It is impossible to suggest any definite kinds of 

 rotations which will be applicable under all con- 

 ditions. Each person must familiarize himself as 

 much as possible with the underlying principles 

 and determine the rotation that is needed under 

 his own special conditions. 



[END OF VOLUME X] 



The physical condition of 

 the soil in practically every 

 case, is more important than 

 the chemical condition; 

 that is, it has a more 

 direct effect upon the crops. 



