412 



Journal of Agricultural Research 



Vol. X, No. 8 



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 — Continued 



SOIL E (hygroscopic coefficient=io.i) 



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. 



0-5 

 •3 



Experi- 

 ment III. 



0.4 

 •3 



Proportion of total distance of 

 penetration covered during 

 interval. 



Experi- 

 ment I. 



Per ct. 



63. O 



7.0 



19. o 



7.0 



3-2 



.8 



Experi- 

 ment II. 



Per ct. 



47-4 



14. 2 



19. I 



7.2 



4.9 



4-3 

 2.9 



Experi- 

 ment III. 



Per ct. 



SO- 



18. 



19. 



4- 



3- 



2-3 



1.6 



SOIL P (hygroscopic COEFFlClENT=IO.o) 



First hour 



First to third hour 



Third to twenty -fourth hour. 



Second day 



Third day 



Fomth day 



Fifth day 



0.4 



•4 



0-5 



49.6 



12. 6 



25.2 



4.0 



8.6 



48.3 

 13.2 

 21.3 

 7.2 

 4.1 

 2.8 

 3-1 



58.1 

 28.5 



13-4 



SOIL G (hygroscopic C0EFFICIENT=8.2) 



First hour 



First to third hour 



Third to twenty -fourth hour. 



Second day 



Third day 



Fourth day 



Fifth day 



0.4 

 •3 



55- 

 8. 



20. 

 7- 

 4- 

 4- 



10. 6 

 20. 2 

 9.0 

 4.9 

 4. 2 

 2.9 



57-2 



12.8 



19. 2 



3-1 



3-7 



1.9 



soil h (hygroscopic coefficient=7.6) 



First hour 



First to third hour 



Third to twenty -fourth hour . . 



Second day 



Third day 



Fourth day 



Fifth day 



o. 2 

 .8 

 . 2 



. I 



3.6 



•5 

 . 2 

 . o 

 . I 

 . o 



0.6 



•3 



48.6 

 10. 6 

 21. o 

 7.6 

 4-3 

 4- 7 

 2.9 



51 



