INSPECTION OF COMMERCIAL FERTILIZERS 

 FOR THE SEASON OF 1934 



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 4 



Fertilizer tonnage 5 



Plant food tonnage 5 



"New England Standard Nine" grades 8 



Mixed fertilizers 9 



Deficiency statistics 9 



Mixing efficiency table 10 



Mixtures showing a commercial shortage of $1 or more per ton 12 



Mixtures substantially complying with guarantees 13 



Chemicals and raw products 35 



Summary of results of the inspection 35 



Nitrogen compounds 36 



Phosphoric acid compounds 39 



Potash compounds 39 



Products supplying nitrogen and phosphoric acid 40 



Miscellaneous 42 



Stone Meal 45 



Definitions and interpretations relating to fertilizers 45 



Acid and basic fertilizers 46 



Massachusetts laws regulating the sale of commercial fertilizers 47 



Recent rulings and regulations 52 



Directory of manufacturers who registered fertilizers for sale in Massachusetts in 1934 . 53 



MANUFACTURERS AND BRANDS 



Registrations have been perfected in Massachusetts during 1934 by 95 firms, 

 covering 439 brands of mixed fertilizer and unmixed fertilizing materials. The 

 nature of these products is shown by the following classification: 



Complete fertilizers 265 



Ammoniated superphosphates 3 



Superphosphates with potash 1 



Dry ground fish, tankage and ground bone .... 47 



Fertilizer simples, including organic nitrogen compounds 77 



Tobacco stems 1 



Pulverized manures 26 



Cotton hull ashes and wood ashes 3 



Peat products 9 



Stone meal 2 



Nitrate of potash 5 



Total 439 



1 Assisted by H. Robert DeRose, Albert F. Spelman, J. W. Kuzmeski, Raymond D. Coldwell, 

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

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



