INSPECTION OF COMMERCIAL FERTILIZERS 

 FOR THE SEASON OF 1938 



By H. D. Haskins, Official Chemist « 



CONTENTS 



Page 



Manufacturers and brands 2 



Comparative cost of fertilizer chemicals and unmixed fertilizer products 3 



Fertilizer trade values 4 



Fertilizer tonnage 5 



Plant food tonnage 5 



"New England Standard Nine" grades 7 



Mixed fertilizers 9 



Deficiency statistics 9 



Mixing efficiency table 11 



Acid and basic fertilizers 11 



Average analysis of mixed fertilizers 11 



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



Mixtures substantially complying with guarantees 14 



Chemicals and raw products 38 



Summary of results of the inspection 38 



Nitrogen compounds 39 



Phosphoric acid compounds 42 



Potash compounds 43 



Products supplying nitrogen and phosphoric acid 44 



Pulverized animal manures 46 



Miscellaneous 48 



Colloidal Phosphate with Mineral Colloids 50 



Directory of manufacturers who registered fertilizers for sale in Massachusetts in 1938 . 50 



MANUFACTURERS AND BRANDS 



Registrations have been perfected in Massachusetts during 1938 by 97 firms, 

 covering 533 brands of mixed fertilizer and unmixed fertilizing materials. The 

 nature of these products is shown by the following classification: 



Complete fertilizers 



Ammoniated superphosphates 



Superphosphates with potash 



Dry ground fish, tankage and ground bone 



Fertilizer simples, including organic nitrogen compounds 



Tobacco stems 



Pulverized manures .... 

 Cotton hull ashes and wood ashes 



Peat products 



:Stone meal 



Nitrate of potash ....'. 



Total 



337 

 3 

 3 



48 

 96 

 1 

 30 

 7 

 2 

 1 

 5 



533 



i Assisted by II. Robert DeRose, John W. Kuzmeski, Albert F. Spelman, Stuart P. Stiles, 

 Chemists; James T. Howard, C. L. Whiting, G. E. Taylor, Sampling Agents; Harry I.. Allen, 

 Laboratory Assistant; Cora B. Grover, Clerk. 



