INSPECTION OF COMMERCIAL FERTILIZERS 

 FOR THE SEASON OF 1933 



By H. D. Haskins, Official Chemist i 



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 9 



Mixed fertilizers 10 



Deficiency statistics 11 



Mixing efficiency table 11 



Mixtures showing a commercial shortage of $1 or more per ton 13 



Mixtures substantially complying with guarantees 14 



Chemicals and raw products 36 



Summary of results of the inspection 36 



Nitrogen compounds 37 



Phosphoric acid compounds 39 



Potash compounds 40 



Products supplying nitrogen and phosphoric acid 40 



Miscellaneous 42 



Stone Meal 44 



Directory of manufacturers who registered fertilizers for sale in Massachusetts in 1933 . 45 



MANUFACTURERS AND BRANDS 



Registrations have been perfected in Massachusetts during 1933 by 106 firms, 

 covering 495 brands of mixed fertilizer and unmixed fertilizing materials. The 

 nature of these products is shown by the following classification: 



Complete fertilizers 301 



Ammoniated superphosphates 5 



Superphosphates with potash 2 



Dry ground fish, tankage and ground bone .... 53 



Fertilizer simples, including organic nitrogen compounds 83 



Tobacco stems 2 



Pulverized manures 31 



Cotton hull ashes and wood ashes 3 



Peat products 7 



Stone meal 2 



Nitrate of potash 4 



Garbage tankage 2 



Total 495 



Representative samples of the following brands were not drawn as they were 

 not found on display by our sampling agents. 



' Assisted by H. Robert DeRose, Albert K. Spelman, J. W. Kuzmeski, F. Civille Pray, Chemists; 

 .Tames T. Howard C. L. Whiting, A. c;. Brigham, G. E. Taylor, Sampling Agents; Harry L. Allen, 

 Laboratory Assistant; Cora B. (;rovcr Clerk. 



