LIMIT OF PHYSIOLOGICAL WATER 



43 



The plants grown in the excessively moist soil did not de- 

 velop a root system so vigorous or so extensive as those 

 grown in the dryer soil. The leaves were a lighter green, 

 and the growth of the plant was less rapid. The general 

 effect of excessive soil water was similar to that of a humid 

 atmosphere on a plant which is growing in a soil containing 

 abundant but not excessive soil moisture. 



In comparison with the previous results, in the following 

 table are given some data obtained by growing plants of 

 hydrophytic tendencies under the same conditions of light 

 and air in which the former were grown. 



