1920.1 



PUBLIC DOCUMENT — No. 31. 



21a 



(a) Fertilizers registered. 

 During the season of 1919, 101 manufacturers, importers and 

 dealers have secured certificates for the sale of 468 brands of 

 fertilizer, fertilizing materials and agricultural limes. They 

 may be classed as follows : — 



Complete fertilizers, 143 



Ammoniated superphosphates, 174 



Ground bone, tankage and dry ground fish, 48 



Wood ashes, 4 



Chemicals and organic nitrogen compounds, 71 



Agricultural limes, 28 



468 

 (h) Fertilizers collected and analyzed. 

 During the year 7,237 tons of fertilizer were sampled, 

 necessitating the sampling of 14,889 sacks; 153 towns were 

 visited; 1,029 samples, representing 418 distinct brands, were 

 drawn from stock found in the possession of 369 different 

 agents or owners; 616 analyses were made in the year's in- 

 spection. The materials inspected, as well as the number of 

 analyses made, are given in the following table : — 



(c) Fertilizer Tonnage. 

 In accordance with chapter 220, General Acts of 1918, a 

 declaration of the tonnage of fertilizers sold in Massachusetts 

 has been made. From these data we find that from Julv 1, 



