26 a 



EXPERIMENT STATION. 



[Jan. 



Fertilizer Section. 



Feriilizer Inspection. — During the season of 1920, 98 manu- 

 facturers, importers and dealers have secured certificates for 

 the sale of 583 brands of fertihzer, fertihzing materials and 

 agricultural limes. In the year's inspection, 7,403 tons of 

 fertilizer were sampled, necessitating the sampling of 17,919 

 sacks; 193 towns were visited; 1,311 samples, representing 492 

 distinct brands, were drawn from stock found in the possession 

 of 710 different agents or owners; and 738 analyses were made. 

 The table shows the number of brands of the different materials 

 which were registered and sampled, as well as the number of 

 analvses made: — 



Material. 



Brands reg- 

 istered. 



Brands col- 

 lected. 



Number of 

 Analyses. 



Complete fertilizers, .... 



Ammoniated superphosphates, 

 Superphosphate and potash, . 

 Ground bone, tankage and dry ground fish. 

 Nitrogen compounds, .... 

 Phosphoric acid and potash compounds. 



Wood ashes, 



Lime compounds, 



Totals 



I ■ . 



292 

 119 

 6 

 54 

 40 

 45 

 2 

 25 



583 



250 

 95 



3 

 51 

 34 

 31 



4 

 24 



331 



117 



3 



78 

 100 

 49 

 36 

 24 



738 



A declaration of the tonnage of commercial fertilizers sold in 

 Massachusetts between the dates of Jan. 1, 1920, and July 1, 

 1920, showed a total of 57,845 tons, divided as follows: — 



Tons 



IVIixed fertilizers, 47,842 



Unmixed fertilizers, 10,003 



Full details of the fertilizer inspection work may be found in 

 Bulletin No. 14, Control Series, published in December, 1920. 



Miscellaneous Analytical Work. — During the last two months 

 in 1919 and the first three months in 1920 the usual amount 

 of co-operative chemical work was done on problems of the 

 Agricultural Department of the Experiment Station, and on 



