INSPECTION OF COMMERCIAL FERTILIZERS 

 FOR THE SEASON OF 1936 



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 1] 



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



Mixtures substantially complying with guarantees 14 



Chemicals and raw products 34 



Summary of results of the inspection 34 



Nitrogen compounds 35 



Phosphoric acid compounds 39 



Potash compounds 39 



Products supplying nitrogen and phosphoric acid 40 



Miscellaneous 42 



Pulverized animal manures 44 



Menderth 46 



Directory of manufacturers who registered fertilizers for sale in Massachusetts in 1936 . 46 



MANUFACTURERS AND BRANDS 



Registrations have been perfected in Massachusetts during 1936 by 89 firms, 

 covering 490 brands of mixed fertilizer and unmixed fertilizing materials. The 

 nature of these products is shown by the following classification: 



Complete fertilizers 290 



Ammoniated superphosphates 1 



Superphosphates with potash 1 



Dry ground fish, tankage and ground bone .... 48 



Fertilizer simples, including organic nitrogen compounds . 104 



Tobacco stems 1 



Pulverized manures 29 



Cotton hull ashes and wood ashes 6 



Peat products 2 



Stone meal 1 



Nitrate of potash 7 



Total 490 



lAssisted by H. Robert DeRoae, John W. Kuzmeski, Albert F. Spelman, Walter Wainio, Chem- 

 ists; James T. Howard, C. L. Whiting, G. E. Taylor, Sampling Agents; Harry L. Allen, Labora- 

 tory Assistant; C'ora B. Grover, Clerk. 



