I'Otf A MANUAL ,b^t VEGETABLE PLANTS. 



ments have shown us that bringing the seed 

 .from a distance, where it has been grown on 

 soil of a different character from that on which 

 it is to be planted, will nearly always cause po- 

 tatoes to yield far more than where the same 

 or an equally good variety is continually 

 propagated on the same soil. 



