AUitiliKST, MASS. 



CONTROL SERIES BULLETIN No. 25 NOVEMBER, 1923 



MASSACHUSETTS AGRICULTURAL EXPERIMENT STATION 



INSPECTION OF COMMERCIAL FERTILIZERS 



By H. D. Haskins, L. S. Walker and S. J. Broderick 



The farmers of Massachusetts during the past year (July 1, 1922, 

 to July 1, 1923) used 63,709 tons of mixed and unmixed fertilizer 

 materials, involving a total outlay of $3,149,126. Such an expend- 

 iture for fertilizer materials warrants a most careful inspection 

 in order that the consumer may receive adequate protection against 

 inferiority and possible fraud. This the State has given the farmer 

 through the control service of its Experiment Station, and the re- 

 sults are presented in this bulletin. It is worth while for fertilizer 

 consumers to study the various tables and comments herein pre- 

 sented in order that they may learn at first hand the quality of 

 the different mixtures and unmixed materials offered, and see if 

 it may not be possible for them to buy and use fertilizers to better 

 advantage. 



Requests for bulletins should be addressed to the 



AGRICULTURAL EXPERIMENT STATION 

 AMHERST. MASS. 



