27 



Table showing the comparative pound cost of nitrogen, potash 

 and phosphoric acid in its various forms in the three grades of fer- 

 tilizer. 



ELEMENT 



Low Grade 

 Fertilizer 



Medium Grade 

 Fertilizer 



High Grade 

 Fertilizer 



Xilrogon 



Potash (as Muiiaic) 



Soluble Phosphoric Acitl 

 Reverted Phosphoric Aciil 

 Insoluble Phosphoric Acid 



38.6 cts. 

 8.2 " 

 8.7 " 

 7.7 " 

 3.9 " 



cts. 



This table shows : 



(1). That the purchase of high grade fertilizers in place of low 

 grade goods has saved over 10 cents on every pound of nitrogen 

 and over 2 cents on every pound of potash and phosphoric acid 

 purchased. 



(2). That the purchase of high grade fertilizers in place of 

 medium grade goods has saved over 5 cents on every pound of 

 nitrogen and over 1 cent on every pound of potash and phosphoric 

 acid. 



(3). Taking the average analj'sis of the high grade fertilizer 

 as a basis the purchase of the high grade in place of the low grade 

 goods would mean a saving of $14.23 on every ton purchased; the 

 purchase of the high grade in place of the medium grade would 

 mean a saving of $7.12 on every ton ptirchased. 



(4). About 54% of the number of brands sold in Massachu- 

 setts are classed as medium or low grade fertilizers. Assuming 

 that the tonnage of these goods was as large as for the high grade 

 brands, there would have been a tremendous saving to the Massa- 

 chusetts farmer had he bought only high grade fertilizer. 



(5). The purchaser of fertilizers should look to the guaran- 

 teed analysis and remember that he is bu^Hng pounds of plant food 

 as well as tons of fertilizer. He should know the form and about 

 the proportion of the various elements of plant food and should 

 purchase the brand which sells for the least money which comes 

 nearest fulfilling his reqmrements. 



(6). Everyone should consider and profit by the lessons taught 

 by the above data. 



