Aug. 20, 19 1 7 



Relation of Soil Water Movement 



411 



Table XIII. — Change in the moistened layer of the ratio of the water content to the hygro- 

 scopic coefficient and the proportion of the total distance of penetration covered during 

 successive intervals following the application of I inch of water to the surface of the 

 soil columns 



SOIL A (hygroscopic CO EFFICIENT =13. 3) 



Inten^aL 



First hour 



First to third hour 



Third to twenty -fourth hour . 



Second day 



Third day 



Fourth day 



Fifth day 



Fall in ratio of water content 

 to hygroscopic coefficient. 



Experi- 

 ment I. 



Experi- 

 ment II. 



Experi- 

 ment III. 



0.4 



Proportion of total distance of 



penetration covered during 



interval. 



Experi- 

 ment I. 



Per ct. 

 59-8 

 15-6 

 19. 6 



5-0 



Experi- 

 ment III 



Per ct. 

 43-6 



21. 2 



22. I 

 4.6 



4.4 

 2.4 



1-7 



SOIL B (hygroscopic C0EFFICIENT=I2.9) 



First hour 



First to third hour 



Third to twenty-fourth hour . 



Second day 



Third day 



Fourth day 



Fifth day 



.6 



0.6 

 •3 



48.7 



27-3 

 24. I 



SOIL c (hygroscopic coefficient=io.5) 



First hour 



First to third hour 



Third to t-wenty -fourth hour . 



Second day 



Third day 



Fourth day 



Fifihday 



0-3 

 •3 



SI- 3 



"•5 



21. I 



7.2 



3-5 

 30 



3-4 



SOIL D (hygroscopic coefficient =10.2) 



First hour 



First to third hour 



Third to twenty-fourth hour. 



Second day 



Third day 



Fourth day 



Fifth day 



0.6 



.6 



0.8 



57- o 



12. I 



23-5 



5-3 



2. I 



