ENERGY AND NITROGEN TRANSFORMATION 



511 



Table 48 has been compiled from the results of Lipman and associates, 8 

 who added different organic nitrogenous materials to 100 gram por- 

 tions of soil; the moisture content was brought to an optimum and the 

 soils incubated for 7 days, when the ammonia was determined by 



TABLE 47 



Influence of concentration of sugar upon the accumulation of ammonia from 2% 



peptone solution by Asp. niger 



TABLE 48 

 Influence of carbohydrates upon the accumulation of ammonia from nitrogenous 



organic materials 



distilling with MgO. Rice flour and corn meal, with a wide carbon- 

 nitrogen ratio allowed no accumulation of ammonia at all either with or 



8 Lipman, J. G., Blair, A. W., Owen, I. L., and McLean, H. C. Experiments 

 on ammonia formation in the presence of carbohydrates and other non-nitroge- 

 nous organic matter. N. J. Agr. Exp. Sta. Bui. 247. 1912. 



