160 FOOD FOR PLANTS 



The fertilized plot received Nitrate of Soda at the 

 rate of eight lbs. per tree in 1921, six lbs. per tree 

 in 1922, five lbs. per tree in 1923 and four to five lbs. 

 per tree in 1924. In 1923 eight lbs. of acid phosphate 

 per tree were also applied." 



Addendum. 



The estimated five-year average value of these 

 crops, namely, tobacco, potatoes and apples, for the 

 years 1914-18 is reported as follov^s, cotton being 

 added for comparison: 



Apples $ 184,774,000 



Tobacco 208,426,000 



Potatoes 372,239,000 



Cotton 1,097,039,000 



The largest single apple growing area in the United 

 States begins in York County, Pennsylvania, and 

 runs southwest in a section perhaps not far from one 

 hundred miles down to fifty miles in width through 

 Maryland, western Virginia and western North 

 Carolina. 



Some apples are also grown in eastern Maryland 

 and southwestern New Jersey, as well as in the east- 

 ern counties of New York state along the Hudson 

 Valley, and also in the heart of New England. The 

 northwestern counties of New York state grow apples 

 commercially also. 



