80 INTENSIVE FARMING 



bone meal, floats, or as superphosphate. Usu- 

 ally treated rock phosphate supplies the cheap- 

 est source of phosphoric acid. Thomas slag is 

 also a reasonable source for this ingredient. 

 The iron carried in Thomas slag may upon 

 some soils low in iron prove of advantage in 

 coloring the fruit. 



The problem of fertilization is a local one. 

 Each orchardist must determine the kind and 

 amount of fertilizer required by his orchard. 

 The soil, the variety, and the method of man- 

 agement will all be found to be factors in the 

 fertility problem. No general formula can be 

 given to cover all cases. 



Conclusion. Apple culture under scientific 

 management is a highly remunerative industry. 

 The yield is sometimes as high as fifteen barrels 

 per tree. There may be as many as thirty or 

 forty adult trees to the acre an"3 the price of 

 fruit ranges from one dollar to four dollars per 

 barrel for the fruit. Thirty trees per acre at 

 i bbl. per tree at $1.00 per bbl. is qual to 

 $30.00 per acre. Thirty trees at 15 bbls. 

 equals 450 bbls. at $3.00 equals $1,350.00 per 

 acre. These figures represent the range of pos- 

 sibility in apple growing. 



