Food for 

 Plants 



218 



Cost of One Pound of Plant-Food in Different 

 Grades of Fertilizers. 



From these data, we readily see the truth of the follow- 

 ing statements: 



1. The cost of one pound of plant-food, whether Nitro- 

 gen, phosphoric acid or potash, is greatest in low-grade and 

 least in high-grade, fertilizers. One purchaser of low-grade 

 goods paid 36.8 cents a pound for Nitrogen, while the highest 

 price paid in high-grade goods was 26 cents, which is less than 

 the average paid for Nitrogen in low-grade goods. The 

 least amount paid for one pound of Nitrogen in low-grade 

 goods was 20 cents, in high-grade goods 13.3 cents. Similar 

 relations hold good in respect to the other elements of plant- 

 food. 



2. In general, the higher the grade of goods, the lower 

 the cost of each pound of plant-food. 



Tabulated General Summary. 



In the table following, we give a general summary of 

 the data that have been presented, showing the cost of one 

 pound of plant-food in different forms to consumers: 



