CONTROL SERIES No. 60 

 (b) Tonnage of Unmixed Fertilizing Materials. 



In expressing the grade in mixed fertilizers, nitrogen is given first, followed 

 by the ammonia equivalent in parentheses, available phosphoric acid and 

 potash. This custom will be modified in 1932 when the ammonia equivalent 

 will be eliminated. 



Of the total tonnage of fertilizer sold, 66.8 per cent was mixed and 33.2 

 per cent was unmixed materials and pulverized manures. The proportion of 

 mixed fertihzers was larger by 2.4 per cent than during 1930. Of the 39,492 

 tons of high-analysis complete fertilizers, 75.4 per cent were furnished by 10 

 grades and 159 brands. 



Double and multiple strength mixtures totalled 1,207 tons, which is 460 

 tons less than for 1930. 



Of the 43,463 tons of mixed fertilizer sold, 90.75 per cent contained 14 per 

 cent or over of available plant food and 9.25 per cent contained less than 

 14 per cent and would thus be classed as low-analysis fertilizers; this is % of 

 1 per cent less than for the previous year. The amount of ammoniated super- 

 phosphates and superphosphates with potash sold was less than 0.2 per cent 

 of the total tonnage of mixed goods. 



There were 440 tons less of low-analysis complete fertilizers sold than in 

 1930. The 4.11 (5)-3-5 grade, comprising 12 brands, furnished about 41 per 

 cent of the tonnage of low-analysis complete fertilizers. About 73 per cent 

 was furnished by 3 grades, comprising 17 brands. 



The tonnage of unmixed materials was distributed as follows: nitrogen 

 products, 37.63 per cent; phosphoric acid products, 22.34 per cent; potash 

 products, 4.99 per cent; tankage, fish, bone, wood ashes, 18.05 per cent; 

 miscellaneous, 5.76 per cent. 



