214 



SOILS AND FERTILIZERS 



Difference between estimated value and selling 

 price, No. i, $9.25; No. 2, $8.76. 



274. Home Mixing. — At the New Jersey Experi- 

 ment Station it has been shown that " the charges of 

 the manufacturers and dealers for mixing, bagging, 

 shipping, and other expenses are on the average $8.50 

 per ton, and also that the average manufactured fer- 

 tilizer contains about 300 pounds of actual fertilizing 

 constituents per ton. These figures are practically 



Fig. 34. Composition of Fertilizers. 



true of other states where large quantities of commer- 

 cial fertilizers are used." 71 In states where smaller 

 amounts are used the difference between the estimated 

 cost and selling price is greater than $8.50. 



These facts emphasize the economy of home mixing. 

 The difference in price between the raw materials 

 and the product sold is frequently so great that it is an 

 advantage for the farmer to purchase the raw mate- 

 rials, as sulphate of potash, nitrate of soda, and acid 



