INSPECTION OF COMMERCIAL FERTILIZERS 5 



There were 13,034 tons of plant food sold, which is 144 tons more than was sold 

 in 1939. 



The tonnage tables present figures for one year, July 1, 1939, to July 1, 1940, 

 for both mixed fertilizers and unmixed fertilizer materials. In case of the mixed 

 fertilizers, the grade represents the plant food guarantee and is expressed in the 

 order of nitrogen, available phosphoric acid, potash. 



Of the 43,736 tons of mixed fertilizer sold, 73 per cent was furnished by 10 

 grades and 144 brands. High analysis grades totaled 4,100 tons and 24 brands, 

 which is 877 tons more than in 1939. Although the total tonnage of mixed ferti- 

 lizers shows an increase of 2,120 tons, or 4.9 per cent, the high analysis grades 

 show an increase of 16.4 per cent. This indicates a continuing trend toward the 

 manufacture of higher grade fertilizers. 



Tonnage of Mixed Fertilizers. 



Complete Fertilizers. 



Superphosphate with Potash. 



Ammoniated Superphosphate. 



0-20-20 



4-10-0 



