WATER CONTENT OF PLANT AND SOIL 



27 



SOIL 



Sand . . . 

 Loam . . 



Saline. . 

 Clay . . . 

 Loess. . . 

 Humus, 



IN "WILTING 

 PLANT, fo 



72.2 

 81.7 



83.4 

 76.0 

 82.4 

 83 5 



IN TURGID 

 PLANT, % 



93.0 

 93.0 

 93.0 

 93.0 

 92.5 

 92.0 



Average of Results. 

 Physical Conditions at the Time of Wilting. 



Air temperature 98 ° 



Relative humidity 47% 



Soil temperature 105 " 



Maximum light 35% 



(Number of plants, 60.) 



If from these data the soils are arranged according to the 

 amount of water they contained at the time the plants were 

 wilting, they make the following series from the highest to 

 the lowest per cent: saline, humus, loam, loess, clay, 

 sand. 



The following table indicates the average time the plants 

 in each soil were subjected to drought, the average per cent 

 of water lost from each soil, and the average per cent of 

 water lost from the plants if based on the amount found in 

 turgid plants. 



