FERTILIZERS AND AGRICULTURAL LIME 



35 



Animal Tankage, Ground Fish, Process Tankage, Dried Blood, and Milorganite 



These products were examined for evidence of adulteration by either the ad- 

 dition of inorganic nitrogen carriers or the inclusion of materials containing the 

 major portion of their nitrogen in water soluble organic form. All samples 

 tested contained normal percentages of water insoluble nitrogen. 



The activity of the water insoluble nitrogen of these organic fertilizers was 

 tested by the alkaline permanganate method and in all cases was found well above 

 the minimum percentage considered satisfactory , indicating either the absence of 

 low grade, slowly available organics, or their presence in only small quantities. 



None of these samples contained more than traces of ammonia nitrogen. 



Samples Showing Commercial Shortage of More than $1 per Ton 



a Commercial shortage $1.97 per ton. 

 b Commercial shortage $1.74 per ton. 

 c Commercial shortage $1.71 per ton. 



d Commercial shortage $1.51 per ton. 

 e Commercial shortage $1.34 per ton. 



