14 CONTROL SERIES No. 54 



Mixtures Substantially Complying with the Guarantee. In addition 

 to the analysis of those fertilizers substantially complying with the guarantee, 

 this table includes also those mixtures that are more or less out of balance; that 

 is, having deficiencies in one or more plant food elements, but having overruns 

 which largely offset the value of the deficiencies. Fortunately, only a very few 

 of these were found, and as the analyses are given in sufficient detail so that the}' 

 may be readily discovered, they are not placed in a group by themselves as for- 

 merly, when the more abbreviated tables were used. 



"Number of samples" indicates the number of samples included in the com- 

 posite which was analyzed. 



Inferior Nitrogen. The presence of inferior forms of organic nitrogen is indi- 

 cated by footnotes. 



Potash Forrn,s. Wherever tests for clilorine showed a sufficient amount present 

 to unite with all of the ]iotash foimd, the source of the potash is designated as 

 muriate. Wherever insufficient chlorine was found to account for all of the potash 

 it is evident that forms of potash other than muriate were used. In such cases, 

 the figures under the sub-heading "As muriate" do not imply necessarily that 

 muriate of potash was actually added to the mixture, but that chlorine was 

 present, probably from impurities in the fertilizer chemicals, in amounts to ac- 

 count for the percentage of potash indicated. The balance of the potash found 

 is listed under the sub-heading "In forms other than muriate" and may be derived 

 from sulfate, nitrate, or carbonate, as the case may be. 



