14 



merits of private formulas. Parties having fertilizers of this des- 

 cription should communicate with the experiment station as soon as 

 the shipment arrives, and so far as possible arrangements will be 

 made to have the same inspected. 



From data collected during the past year, 6914 tons of fertilizer 

 were sampled. This necessitated sampling from 16,709 different 

 sacks. Of the complete fertilizers sampled 60 per cent of the total 

 tonnage were high grade fertilizers, (valued over $24.00 a ton), 31 

 per cent were mediiun grade, (valued between $18.00 and $24.00 a 

 ton), and 9 per cent were low grade, (valued less than $18.00 a ton). 

 During the season of 1915, 150 towns were visited and 1322 

 samples, representing 513 distinct brands, were drawn from stock 

 found in possession of 353 different agents. 



Seven hundred and twenty-one analyses (505 dis- 

 Fertilizers tinct brands) have been made during the year's in- 



Analyzed, spection. They are as follows: 



Complete fertilizers 373 



Fertilizers furnishing phosphoric acid and potash 20 



Ground bone, tankage and dry ground fish 61 



Nitrogen compounds 190 



Potash compounds 7 



Phosphoric acid compounds 34 



Lime compounds 36 



721 



The following table of trade values was adopted at a 

 Trade Values meeting of representatives of the experiment sta- 

 of Fertilizing tions of New England, New York and New Jersey 

 Ingredients. held during the first week in March, 1915. They 



represent the average cost per pound at retail for 

 the six months preceding March 1, 1915 of nitrogen, potash and phos- 

 phoric acid as furnished by chemicals and standard unmixed fertiliz- 

 ing materials in the large markets of New England and New York. 

 In the main they represent the average wholesale quotations on chem- 

 icals and raw products which appeared in the various fertilizer and 

 allied trade journals from September 1, 1914^to March 1, 1915, plus 

 about 20 per cent. 



Cents per pound. 



Nitrogen. 1914 1915 



In ammonia salts 16.5 15.5 



In nitrates 16.5 15 . 



Organic nitrogen in dry and fine ground fish, 



blood and meat 22 . 5 22 . 



Organic nitrogen in fine* bone and tankage .... 21.5 21 . 



Organic nitrogen in coarse* bone and tankage . . 17.5 17. 



