INSPECTION OF COMMERCIAL FERTILIZERS 



35 



Nitrogen Compounds. 



The chemicals and unmixed materials under this heading are valued chigfly 

 for the nitrogen which they contain. Some of them, however, contain more 

 than this one element; the nitrate of potash containing potash; the calcium 

 nitrate and eyanamid containing lime; and the organic vegetable substances 

 containing small quantities of phosphoric acid and potash, as will be noticed 

 by a reference to the summary table on the previous page. 



Brands showing a commercial shortage of one dollar or more per ton are 

 listed by themselves, serious deficiencies being emphasized by boldface type. 



Sulfate of Ammonia and Nitrate of Soda. 



Brand Showing Commercial Shortage of More than $1 per Ton. 



International Agricultural Corp. 



a Champion brand. 



b Standard brand. 



c Commercial shortage, $1.11 per ton. Explanation of manufacturer: This product was re- 

 milled and in putting it through the grinder it was contaminated by other plant foods in the mill. 

 We ran a test by the modified Kjeldahl method and found 20.18% total nitrogen: there was also 

 present .53% phosphoric acid and .43% water soluble potash. This confirms the findings of the 

 manufacturer. 



