42 



CONTROL SERIES No. 51 



Nitrogen Compounds. 



Under this heading will be found the fertihzer chemicals and unmixed materials 

 valued chiefly for their nitrogen. Averages are given where more than one 

 analysis has been made of the same brand; these are indicated by footnotes. 

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

 separate group and deficiencies are emphasized by boldface type. 



Nitrate of Soda and Sulfate of Ammonia. 



Brands Showing a Commercial Shortage of $1 or More per Ton. 



Eastern States Farmers' Exchange 



18.16rf 20.. iO 



a Three analyses. 



h Two analyses. One other sample showed a commercial shortage of more than $1 per ton. 



c Two analyses. 



d Coiiuiiercial shortage, $6.99 per ton. There were 1.55% of chlorine and 4.15% of potash 

 present, which would indicate that a mistake occurred in placing potash-manure salts in an ammon- 

 ium sulfate bag which formed a part of the shipment of ammonium sulfate to this customer. 



