152 FARM AND SCHOOL PROBLEMS. 



Rejuvenation of Orchards. 



The results of the reawakening of a practically lost industry 

 in a section of Ohio where that industry was many years before 

 of considerable importance is shown by the following marvellous 

 change : 



Previous to 1909 one county in Ohio was buying apples for 

 home consumption. In 1909 the Ohio Experiment Station began 

 a series of demonstration experiments with the result that the 

 sale of apples from unsprayed trees amounting to $5,000 in 1909 

 increased to $65,000 in 1910; and in 1911 the income from the 

 apple crop advanced to $200,000, and the work has but fairly 

 been begun. 



AN OHIO "RECORD ACRE" OF FORTY ROME BEAUTY TREES. 



This acre was scientifically sprayed and thinned, with the 

 following results in 1911: 



First grade, 2% inches and above in diameter 1,158 bushels 



Second grade, 2% down to 2 inches in diameter 120 bushels 



Good "drops" knocked off during picking 123 bushels 



Defective and below 2 inches in diameter 28 bushels 



Total product from the acre - 1,429 bushels 



PROBLEMS. 



1. At the above rate of production what would be the income from 

 a 20 acre orchard at the present price for first grade apples? 



2. An average gain of $4.72 per tree was obtained on the poor soils 

 of southeastern Ohio, in three orchard expeirments, by the use of nitrog- 

 enous fertilizers, at a cost of not to exceed 15 cents per tree. At that 

 rate what would be the net income on an investment necessary to fertilize 

 500 trees? 



A well thinned orchard of 62 trees in Ohio, produced but 

 21 pounds of apples under 2 inches in diameter, while a single 

 unthinned tree of the same age and variety in the same orchard 

 produced 28 pounds of apples under 2 inches in diameter. 



3. If the total cost of spraying, fertilizing and thinning a tree is 

 $1.00, and produces an increased yield of $6.00 per tree over trees that 

 are untreated, what is the percentage of income on the investment in 

 spraying, fertilizing and thinning? 



