26 



When the minimum nitrogen guarantee is made up of nitrogen 

 in available form and the test shows that 50 percent of the water in- 

 soluble nitrogen is inactive, the indications are that 200 pounds or so 

 of some low grade organic substance (such as peat or garbage tankage) 

 was used as a conditioner. Such cases should not be condemned, 

 for it is necessary to have a certain proportion of organic matter 

 present to avoid caking and insure a good mechanical mixture and 

 one that can be properly distributed by the drilling machine. Wher- 

 ever a conditioner of this sort is used it should be, of course, so stated 

 on the tag. 



The following summary table shows the average amount found 

 and the quality of nitrogen used by each manufacturer in the brands 

 sold during 1913. See table on opposite page. 



