220 NITROGENOUS FERTILIZERS 



in the protein form which ammonifies and nitrifies with 

 varying degrees of rapidity. This form of nitrogen, however, 

 is of more lasting effect, since there is no danger of leaching 

 as in the case of the nitrates. Their effect on the soil is not 

 great, other than a slight tendency toward acidity due 

 to the formation of organic acids and nitric acid during the 

 process of decomposition and nitrification. 



REFERENCES 

 See references at end of Chapter VIII. 



