ROOT SYSTEMS IN ARID SOILS 



91 



Nebraska to a depth of fifty feet. Hilgard further 

 declares that in Cahfornia fibrous-rooted plants, 

 such as wheat and barley, may descend in sandy 

 soils from four to seven feet. Orchard trees in the 



Fig. 26. Difference in root systems under humid and arid conditions. 



arid West, grown properly, are similarly observed 

 to send their roots down to great depths. In fact, 

 it has become a custom in many arid regions where 

 the soils are easily penetrable to say that the root 

 system of a tree corresponds in extent and branching 

 to the part of the tree above ground. 



