28 



In the above table it will be seen that some manufacturers' 

 goods show a satisfactory and even high percentage activity of 

 the total nitrogen while the percentage activity of the organic 

 nitrogen present is relatively low. The meaning of this is that a 

 larger proportion of the total nitrogen is present in mineral form 

 (as nitrates and ammoniates) and to keep such a formula in good 

 mechanical condition so as to drill readily and not cake, a certain 

 amount of conditioner may have been used such as dry ground 



