312 IOWA ACADEMY OF SCIENCE 



It is very evident from the experiments performed that al- 

 falfa bacteria are benefitted by an alkaline reaction while the 

 clover bacteria do best in a neutral or slightly acid medium. 

 The difference in behavior of alfalfa and red clover plants in 

 acid soils is characterized by a corresponding difference in the 

 behavior of their symbiotic bacteria. 



Department op Natural Science, 

 Iowa State Teachers College. 



