21 



(b) Phosphoric Acid. 



It will be seen from the table that 83.26 per cent of the total phosphoric acid was 

 in available form, and 53.62 per cent of the available phosphoric acid was in water 

 soluble form. Ninety-nine brands (35 per cent of the total number of mixed fertilizers 

 analyzed) failed to meet their available phosphoric acid guarantee. 



(c) Potassium Oxide. 



Although the average complete fertilizer contained only .31 per cent more potash 

 than during the previous year, yet there were fewer brands without potash than for 

 several years, and brands were offered with potash ranging from fractional percentages 

 up to 15 per cent. 



Thirty-nine brands designated as tobacco mixtures showed an average of .74 per 

 cent of chlorine, which would be equivalent to 1.56 per cent of muriate of potash. 



AMMONIATED SUPERPHOSPHATES AND SUPERPHOSPHATES WITH 



POTASH. 



Deficiency Statistics. 



The following table shows the number of brands of ammoniated superphosphate 

 and superphosphate with potash registered, and the general character of each manu- 

 facturer's goods as compared with minimum guarantee, as well as the number of tests 

 which were found deficient: — 



