Plate XVII 



Fig. 30. Graphs showing the rang-e of soil moisture at the bottom of the me- 

 sophylic ravine, Station 3, at depths of 7.5 cm. (a) and 15 cm. (b). Broken lines 

 show the wilting coefficients for the scil at depths of 7.5 cm. (c) and 15 cm. (d). 



Fig. 31. Graphs showing the range of soil moisture at the foot of the wash. 

 Station 13, at depths of 7.5 cm. (a) and 15 cm. (b). Broken lines show the wilting 

 coefficients for the soil at depths of 7.5 cm. (c) and 15 cm. (d ). 



