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CHAPTER 6 



RELATION BETWEEN CONSUMPTIVE USE AND 

 DEPTH TO WATER TABLE 



In all investigations involving determination of consump- 

 tive use of water by grasses in tanks in which a predetermined 

 water table has maintained, there has been evidence of a straight- 

 line relation between depth to water table and amount of water 

 consumed. To show this relation graphically for those experimen- 

 tal stations where sufficient data exist, Figure 15 has been pre- 

 pared with saltgrass the medium of the comparison. The plotted 

 points do not always agree with the average; occasionally one is 

 obviously out of line, but enough records have been found consis- 

 tent to permit a close representation. 



20 30 



Consumptive use of water (inches) 



FIGURE 15.-- Relation of consumptive use of water by saltgrass in 

 tanks to depth to water table. 



