CONTROL SERIES No. 60 



FERTILIZER TONNAGE. 



Tonnage of Mixed and Unmixed Fertilizers Sold in Massachusetts. 



July 1, 1928, to 

 July 1, 1929. 



July 1, 1929, to 

 July 1, 1930. 



July 1, 1930, to 

 July 1, 1931. 



Mixed fertilizers 



Fertilizer chemicals and materials unmixed. 

 Pulverized natural manures .... 



41,. 529 

 18,788 

 2,174 



42,881 



21,249 



2,491 



43,463 



19,174 



2,426 



Totals 



62,491 



66,621 



65,063 



Although there were 1,558 tons less fertilizer sold in the state in 1931 than 

 during the previous year, nevertheless, the tonnage of mixed fertilizer was 

 582 more. The tonnage of unmixed materials and pulverized manures was 

 2,075 and 65 less, respectively, than in 1930. 



Of the total tonnage sold, 66.8 per cent was mixed fertilizer, 29.5 per cent 

 was unmixed materials, and 3.7 per cent was pulverized natural manures. 



Plant Food Tonnage. 



There were only 47 tons less of plant food sold in the state than during 

 1930, although the actual tonnage of fertilizer sold was 1,558 less. Ninety-four 

 tons more of available phosphoric acid. 111 tons more of potash, and 252 tons 

 less of nitrogen were used in the state than during the previous season. 



There were 11,650 tons of plant food sold, of which 70.6 per cent was de- 

 rived from mixed goods, 28 per cent from unmixed materials, and 1.4 per cent 

 from pulverized animal manures. The mixed and unmixed materials furnished 

 the three plant food elements in the following proportions: nitrogen, 63 per 

 cent from mixed and 37 per cent from unmixed materials; phosphoric acid, 

 68 per cent from mixed and 32 per cent from unmixed materials; potash, 81 

 per cent from mixed and 19 per cent from unmixed fertilizers. 



The tonnage of the various grades of mixed fertilizers and unmixed fertilizer 

 materials is given in the following tables: 



