CONTROL SERIES No. 60 



INSPECTION OF COMMERCIAL FERTILIZERS 

 FOR THE SEASON OF 1931 



By H. D. Haskins, Official Chemist i 



CONTENTS 



Page 



Manufacturers and brands 2 



Comparative cost of fertilizer chemicals and unmixed fertilizer products 4 



Fertilizer trade values 5 



Fertilizer tonnage 6 



Plant food tonnage 6 



"New England Standard Nine" grades 10 



Mixed fertilizers 10 



Guarantees to be simplified 10 



Deficiency statistics 12 



Mixing efficiency table 13 



Mixtures showing a commercial shortage of $1 or more per ton 15 



Mixtures substantially complying with guarantees 16 



Chemicals and raw products 38 



Summary of results of the inspection 38 



Nitrogen compounds 39 



Phosphoric acid compounds 42 



Potash compounds 42 



Products supplying nitrogen and phosphoric acid 44 



Miscellaneous 45 



Stone Meal 47 



Definition and interpretations relating to fertilizers 48 



Directory of manufacturers who registered fertilizers for sale in Massachusetts in 1931 49 



MANUFACTURERS AND BRANDS 



During the season of 1931, 125 firms or individuals have registered for sale 

 in Massachusetts 589 brands of mixed fertilizer and fertilizing materials. The 

 general nature of these products is shown below. 



Complete fertilizers 357 



Ammoniated superphosphates 4 



Superphosphates with potash 1 



Ground bone, tankage and dry ground fish .... 56 



Fertilizer simples, including organic nitrogen compounds . 130 



Tobacco stems 2 



Pulverized manures 23 



Cotton hull ashes and wood ashes 9 



Peat products 6 



Stone Meal 1 



Total 589 



The following brands were not sampled, for the reason that in some cases 

 no sales were made and in others the goods were used as soon as received. 



lAssisted by H. Robert DeRose, Albert F. Spelman, George J. Larsinos and John B. Zielinski, 

 Jr., Chemists; James T. Howard, C. L. Whiting, A. G. Brigham and G. E. Taylor, Sampling Agents; 

 Harry L. Allen, Laboratory Assistant; Cora B. Grover, Clerk. 



