2 



INSPECTION OF COMMERCIAL FERTILIZERS 

 THE SEASON OF 1927. 



FOR 



BY H. D. HASKINS, Official Chemist, assisted by L. S. WALKER i and M. W. GOODWIN.^ 



MANUFACTURERS AND BRANDS. 



For the season of 1927, 105 manufacturers and their subsidiaries, importers and 

 dealers have registered in Massachusetts 365 brands of mixed fertihzers and 223 

 brands of unmixed fertilizing materials. These are grouped as follows: 



Complete fertilizers . . . . . 



Ammoniated superphosphates . 

 Superphosphate with potash . 

 Ground bone, tankage and dry ground fish . 

 Chemicals and organic nitrogen compounds 

 Wood ashes ...... 



Pulverized manures . . . . . 



Stone meal ...... 



360 



3 



2 



62 



135 



4 



21 



1 



588 



On account of the limited tonnage of some brands that were sold but which had 

 been applied to the soil before the arrival of the sampling agent, no samples were 

 drawn for inspection purposes. Some of the chemicals were not sold in the unmixed 

 condition but were used in special mixtures. Such materials, although subject 

 to registration, were not available for sampling. 



The f oUomng registered brands were not sampled : 



I Resigned May 15. 



' E. W. Martin and E. J. Schmidt assisted in the phosphoric acid laboratory about two and one-half 

 months, and J. W. Kuzmeski in the nitrogen laboratory about three months. 



