

CONTROL SERIES BULLETIN No. 33 DECEMBER, 1925 



MASSACHUSETTS AGRICULTURAL EXPERIMENT STATION 



INSPECTION OF COMMERCIAL FERTILIZERS 



By H. D. Haskins, L. S. Walker and George B. Dalrymple 



This publication is the fifty-second report of the fertilizer 

 inspection work of Massachusetts. Of the 86 firms that have 

 registered fertilizers for sale in the state, about 46 per cent have 

 offices in Massachusetts; the remainder are widely distributed 

 through fourteen states, with two from England and one from 

 Canada. This wide diversity of interest, accompanied by a cor- 

 respondingly great variety of formula mixtures, with its attendant 

 multiplicity of fertilizer chemicals and crude stock products 

 which are ever on the increase, emphasizes the importance of an 

 annual, detailed, unbiased fertilizer control. 



Requests for bulletins should be addressed to the 



AGRICULTURAL EXPERIMENT STATION 

 AMHERST, MASS. 

 Publication of this Document approved by the Commission on Administration and Finance 

 3M 12-'25 Order 3733 



