CONTROL SERIES No. 65 



INSPECTION OF COMMERCIAL FERTILIZERS 

 FOR THE SEASON OF 1932 



By H. D. Haskins, Official Chemist i 



Page] 



Manufacturers and brands 2J 



Comparative cost of fertilizer chemicals and unmixed fertilizer products 4' 



Fertilizer trade values 51 



Fertilizer tonnage 6| 



Plant food tonnage 6 J 



"New England Standard Nine" grades lOl 



Mixed fertilizers 11] 



Deficiency statistics 11 , 



Mixing efficiency table 12; 



Adoption of simplified guarantees 13' 



Mixtures showing a commercial shortage of $1 or more per ton 15j 



Mixtures substantially complying with guarantees 16 j 



Chemicals and raw products 39j 



Summary of results of the inspection 39 1 



Nitrogen compounds 40^ 



Phosphoric acid compounds 43_ 



Potash compounds 43 1 



Products supplying nitrogen and phosphoric acid 45; 



Miscellaneous 47] 



Stone Meal 49 j 



Directory of manufacturers who registered fertilizers for sale in Massachusetts in 1932 49 ; 



MANUFACTURERS AND BRANDS j 



Regiscrations have been perfected in Massachusetts during 1932 by 106; 

 firms, covering 537 brands of mixed fertilizer and unmixed fertilizing materials. 

 The nature of these products is shown by the following classification: ] 



Complete fertilizers 329 ' 



Ammoniated superphosphates 1 



Superphosphates with potash 3 i 



Dry ground fish, tankage and ground bone .... 58 



Fertilizer simples, including organic nitrogen compounds . 105 



Tobacco stems 2 • 



Pulverized manures 23 ^ 



Cotton hull ashes and wood ashes 4 ■ 



Peat products 10 '< 



Stone meal 2 j 



Total 537 j 



Representative samples of the following brands were not drawn as theyi 

 were not found on display by our sampling agents. 



lAssisted by H. Robert DeRose, Albert P. Spelman, J. W. Kuzmeski, Ralph F. Nickerson.i 

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

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



