THE CAMPBELL SYSTEM 



water stored below a little faster may be 

 the means of doubling or trebling the 

 yield." 



In a word the proper use of the sub- 

 surface packer puts the soil into a firm 

 and mellow state, whilst the harrow 

 forms a fine loose mulch of some two or 

 more inches deep, and the drill sets the 

 seed in a fine, firm, moist, mellow bed 

 an ideal place for rapid and vigorous 

 sprouting. According to Mr. Campbell, 

 any one who breaks prairie lands and 

 plants them without first devoting a full 

 season to careful cultivation in order to 

 get the soil in the proper physical condi- 

 tion for the promotion of plant growth, 

 and also to store a sufficient amount of 

 moisture within reach of the plant roots 

 to carry the growing crop through a pro- 

 tracted drought is simply inviting failure, 

 should a season of unusual dryness fol- 

 low. Summing up, it may be said that 

 151 



