INSPECTION OF COMMERCIAL FERTILIZERS 

 FOR THE SEASON OF 1939 



By H. D. Haskins, Official Chemist 1 



CONTENTS 



Manufacturers and brands ......•••••• ^ 



Fertilizer trade values .......••••• 



Fertilizer tonnage ......••••••• 



Plant food tonnage ....•••••••• 4 



Mixed fertilizers 



Deficiency statistics .....••••••• 



Mixing efficiency table ....••••••• 



Acid and basic fertilizers .....••■••• 



Average analysis of mixed fertilizers .....-••• 



Mixtures showing a commercial shortage of $1 or more per ton . . . . 11 



Mixtures substantially complying with guarantees . . . . ■ • • 12 



Chemicals and raw products 



Summary of results of the inspection 36 



Nitrogen compounds .....••••••• **7 



Phosphoric acid compounds ....•••••• 40 



Potash compounds ....•••••••• 



Products supplying nitrogen and phosphoric acid 42 



Pulverized animal manures ....••••••• " 



Miscellaneous ...-••••••••• 



Definitions and interpretations relating to fertilizers . 49 



Directory of manufacturers who registered fertilizers for sale in Massachusetts in 1939 . 49 



MANUFACTURERS AND BRANDS 



Registrations have been perfected in Massachusetts during 1939 by 103 firms, 

 covering 538 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 



335 

 3 

 1 



45 



105 



1 



30 



8 

 3 



1 

 6 



538 



i Assisted by H. Robert DeRose, John W. Kuzmeski, Albert . F. Spelman Leo V. Crowley, 

 Chemiste! James T. Howard, C. L. Whiting, L. A. Graves, Sampling Agents; George E. Taylor, 

 Laboratory Assistant; Cora B. Grover, Clerk. 



