20 IRRIGATION PRACTICE 



tubes filled with soil in pans containing water, and the 

 upward movement has been studied. This is of little 

 interest to the arid regions. Much profitable work may 

 be done for irrigation by the careful study of the move- 

 ment of water applied to soils as under irrigated 

 conditions. 



REFERENCES 



BRIGGS, LYMAN J. The Mechanics of Soil Moisture. United States 



Department of Agriculture, Bulletin No. 10 (1897). 

 BRIGGS, LYMAN J., and SHANTZ, H. L. The Wilting Coefficient for 



Different Plants, and Its Indirect Determination. United 



States Department of Agriculture, Bureau of Plant Industry, 



Bulletin No. 230 (1912). 



HILGARD, E. W. Soils. Chapters VI and XIII (1906). 

 KING, F. H. Physics of Agriculture. Chapters IV and V (1901). 

 WIDTSOE, J. A., and MCLAUGHLIN, W. W. The Movement of 



Water in Irrigated Soils. Utah Experiment Station, Bulletin 



No, 115 (1912). 



