CONTROL SERIES BULLETIN No. 9 OCTOBER, 1918 



MASSACHUSETTS AGRICULTURAL EXPERIMENT STATION 



INSPECTION OF COMMERCIAL FERTILIZERS 



By H. D. HASKINS, L. S, WALKER and H, B. PIERCE 



This bulletin gives a detailed report of the fertilizer inspec- 

 tion for 1918. It states the number and gives an alphabetically 

 arranged list of fertilizers registered and analyzed. Statistics in 

 regard to sampling are given. 



Summaries of wholesale quotations of crude, unmixed fertiliz- 

 ing ingredients are recorded. The chemical character and cost of 

 crude stock materials are discussed, mention being made of those 

 brands showing commercial shortages. 



Statistics are given with reference to the deficiencies shown 

 in the mixed complete fertilizers and ammoniated superphos- 

 phates, brands showing commercial shortages of 50 cents or over 

 per ton being listed. 



The quality of the nitrogen, phosphoric acid and potash con- 

 tained in mixed goods is discussed, special attention being di- 

 rected to those brands which contained inferior forms of organic 

 nitrogen. 



A brief discussion of lime products is followed by some forty 

 pages devoted to tables of analyses, showing in detail the com- 

 position, both found and guaranteed, of each brand of fertilizer 

 or fertilizer materials sold in the State. 



Requests for bulletins should be addressed to the 



AGRICULTURAL EXPERIMENT STATION 



AMHERST, MASS. 



