150 



(23) Parshall, R. L. 



1937. Laboratory Measurement of Evapo-transpiration 



Losses. Jour, of Forestry, V. XXXV, pp. 1033-lOA.O. 



(24) Powers, W. L. , and Johnston, W. W, 



1920. The Improvement and Irrigation Requirement of Wild 



Meadow and Tule Land. Oreg. Agr. Expt . Sta. Bull. 

 167, 44 pp. , illus. 



(25) Shantz, H. L. 



1911. Natural Vegetation as an Indicator of the Capabili- 

 ties of Land for Crop Production in the Great 

 Plains Area. U. S. Dept. Agr., Bur. Plant Indus. 

 Bull. 201, 100 pp., illus. 



(26) and Piemeisel, R. L. 



1924. Indicator Significance of the Natural Vegetation of 



the Southwestern Desert Region. Jour. Agr. Re- 

 search, V. 28, pp. 721-801, illus. 



(27) Shantz, H. L. , and Piemeisel, L. N. 



1927. The Water Requirement of Plants at Akron, Colorado. 

 Jour. Agr. Research, V. 34, pp. 1093-1190, illus. 



(28) Spalding, V. M. 



1909. Distribution and Movements of Desert Plants. 



144 pp., illus. Washington, D. C. (Carnegie 

 Inst. Wash. Pub. 113. ) 



(29) Steams, H. T., and Bryan, L. L. 



1925. Preliminary Report of the Geology and Water Re- 



sources of the Mud Lake Basin, Idaho. U. S. Geol. 

 Survey Water-Supply Paper 56O-D, 134 pp., illus. 



(30) Stout, 0. V. P. 



1934. Irrigation of Weeds and Other Non-Crop Plants 



Costly and Unprofitable. U. S. Dept. Agr. Year- 

 book 1934, pp. 250-253. 



(31) Taylor, C. A., and Blaney, H. F. 



1929. An Efficient Soil Tube Jack. Soil Science, 

 V. XXVII, pp. 351-353, illus. 



