CONTROL SERIES No. 45 



BRIEF SYNOPSIS OF THE FIFTY-FIFTH REPORT OF 

 MASSACHUSETTS FERTILIZER CONTROL 



Brands registered and sampled. 

 Prices of crude stock fertilizer materials. 

 Fertilizer valuations. 



Tonnage of fertilizers and plant food sold. 

 New England Standard Nine and their relation to tonnage sold. 

 Deficiency statistics as applied to each manufacturer. 

 Mixing efficiency table as applied to the larger firms. 



Tables showing composition of 25 samples of mixed fertiUzer having commercial 

 shortage of over $1 per ton and involving 9 manufacturers. 



Table showing analysis of mixed fertilizers seriously out of balance. 



Tables containing abbreviated reports on mixed fertilizers substantially comply- 

 ing with guarantees. 



Detailed analysis of immixed materials which include 56 analyses of a variety 

 of substances found deficient more than $1 per ton or adulterated. 



Definitions and interpretations relating to fertilizers. 



Vegetation pot experiment on 23 organic nitrogen substances including all of 

 the processed low grade nitrogen materials that could be secured through 

 trade channels. 



