6 CONTROL SERIES No. 100 



Of the 41,616 tons of mixed fertilizer sold, 70 per cent was furnished by 10 

 grades and 146 brands. Double- and multiple-strength grades totaled 3,523 

 tons and 36 brands, which was 165 tons more than during the previous year. 

 Although the total tonnage of mixed fertilizers shows a decrease of 3,723 tons, 

 or 8.2 per cent, the double- and multiple-strength grades show an increase of 

 165 tons, or 4.9 per cent. This indicates a continuing trend toward the manu- 

 facture of higher grade fertilizers. 



Of the mixed fertilizer sold, 98.6 per cent contained 14 per cent or over of avail- 

 able plant food. 



There were 153 tons less of low-analysis (less than 14 per cent available plant 

 food) complete fertilizers sold than in 193S. The 5-3-5 grade, comprising 6 

 brands, furnished 85.6 per cent of the tonnage of this class of goods. 



In the following table are listed ten of the most popular grades of mixed fer- 

 tilizer together with the tonnage of each sold in Massachusetts for the years 1938 

 and 1939. 



The tonnage of unmixed materials, as shown in the following table, was dis- 

 tributed as follows: nitrogen products, 38 per cent; phosphoric acid products, 

 37 per cent; potash products, 6 per cent; tankage, fish, bone, nitrate of potash, 

 Ammo-Phos, and wood ashes, 18 per cent; and miscellaneous, 1 per cent. Pul- 

 verized animal manures are not included. 



* In addition there were 876 tons of 45% superphosphate and 903 tons of 47% superphosphate 

 distributed by the Agricultural Adjustment Administration. 



