109 



10.5 

 10.6 



' 10.7 

 10.8 



14 15 16 17 18 19 20 21 

 June 



3.4 



3.5 

 3.6 



18 19 20 21 22 23 24 25 26 27 

 Aug. 

 4.7 



< 14 15 16 17 18 19 20 21 < 



?- Sept. Q^ 



*» « -r 1 1 1 1 1 1 1 1 *' 



Q 9-2| \7\1 I \ \ I \ I Q 

 9.3 



23 24 25 26 

 Aug. 



4.8 

 4.9 

 5.0 



^'x^- 



5 i lPICKLEWEED 

 22 23 24 25 

 Sept. 



FIGURE 14. --Examples of recorder charts showing ground-water 

 fluctuations due to daily transpiration losses by various 

 species of native vegetation (after White). 



yield usable in the consumptive use formula £ = ^(24 r ± £), 

 tanks were filled with undisturbed soil in the vicinity of wells 

 where recorders were maintained. Water was added to or subtracted 

 from the soil and the specific yield computed according to the 

 changed level in the tank. Estimates of consxamptive use were made 

 for a number of vegetative species by this method of obtaining 

 specific yield values. 



Saltgrass . --To support some of the findings reached by 

 means of water-table fluctuations, saltgrass and greasewood were 

 grown in tanks supplied with measured amounts of water. Two salt- 

 grass tanks were employed, one using transplanted sod, the other 

 undisturbed sod and soil obtained by driving the tank into the 

 ground. Greasewood was transplanted in the tank, but only four 

 put of seven plants lived and for some time these grew slowly. 

 By the end of the summer of 1926 these plants were thrifty, and 

 were vigorous during the follov/ing season. 



