11 



Under "Nitrogen" the column headed "Proportion in Mineral Form" includes 

 both the ammoniacal and nitric nitrogen, both of which are water soluble and readily 

 available. Under "Quality of Insoluble Nitrogen" in all of the tables of mixed 

 fertilizers, passed indicates an activity of 50 or over by the allcaline and 80 or over 

 by the neutral permanganate method; inferior indicates an activity below 50 

 and below SO by the respective laboratory methods. All samples are passed which 

 show an activity of the water insoluble nitrogen of 80 per cent or better by the 

 neutral method, even though thej^ may have shown a test below 50 per cent by the 

 alkaline method. All samples are passed which show the sum of the mineral, 

 water soluble organic, and active water insoluble organic nitrogen equivalent to the 

 minimum guarantee. 



Under "Mixtures Showing a Commercial Shortage of SI or More Per Ton," 

 and "Mixtures Seriously Out of Balance but not having Commercial Shortage," 

 deficiencies are emphasized by boldface type. 



In those tables headed "Mixtures Substantially Complying with Guarantees" 

 in the column marked "Form of Potash," the word muriate means that enough 

 chlorine was found present to unite with all of the potash (KjO) found, and it is 

 likely, therefore, that all of the potash was derived from chloride of potash or 

 muriate. 



Figures in parenthesis following the, brand name, in these tables, indicate the 

 number of samples from which the composite sample finally analyzed was drawn. 



The detailed results of analysis of any brand inspected will be gladly furnished 

 to any one sufficiently interested to apply for them. 



