Fertilizers for Peach Orchards 175 



orchard. Doubtless experience has taught that the new 

 trees when so phxnted are likely not to thrive. That a peach 

 tree ''runs its span of life" in twenty years or less, while 

 an apple tree may be at its best when 50 to 75 years of age, 

 may have no bearing on the point in question. Yet these 

 are facts, largely unexplained, w^ith which fruit-growers 

 are conversant. At the present time, the suggestion is 

 purely speculative that these phenomena may ultimately 

 find their explanation through the agency of this rather 

 newly applied soil fertility factor, but at least the field for 

 investigation is open. 



