CAPILLARY MOVEMENT OF SOIL MOISTURE. 
19 
In Table 5 are brought together for comparison the rate of advance 
of moisture and the quantity of water used, expressed in percentages 
of the totals for 30 days, (See Tables 1 and 4.) 
Table 5. — Percentage of distance moved and percentage of water used by 
days upon a 30-day basis. 
Num- 
ber of 
days. 
Plume. 
19 
43 
63 
so 
100 
209 
Dis- 
tance 
moved. 
Water 
used. 
JS. 1 - 
Dis- 
tance 
moved. 
Water 
used. 
Dis- 
tance 
moved. 
Water 
used. 
tafc; kjf 
moved. Uaed ' 
Dis- 
tance 
moved. 
Water 
used. 
1 
2 
3 
10 
15 
20 
30 
Per ct. 
51 
61 
67 
84 
Per ct. 
61 
67 
74 
86 
91 
Per ct. 
41 
60 
66 
82 
Per ct. 
47 
66 
69 
79 
86 
91 
100 
Per ct. 
47 
57 
62 
76 
""""89"" 
100 
Peret. 
40 
50 
55 
74 
87 
93 
100 
Per ct. 
46 
57 
62 
80 
"*92" 
100 
Per ct. 
34 
43 
60 
77 
82 
87 
100 
Ptr ct. 
30 
43 
51 
77 
""'92"" 
100 
Per ct. 
30 
42 
53 
79 
89 
92 
100 
Per ct. 
62 
71 
76 
89 
Perct. 
77 
82 
84 
94 
100 
95 
100 
93 
100 
94 
100 100 
able 6. — Percentage of 
water, by volume, eon- 
tained in the wet soil. 
It is observed that in three of the flumes the percentage of the 
water used at the end of the first day exceeds the percentage of the 
distance moved: in two of the flumes this condition is reversed and 
in the other flume the two percentages are identical. 
Table 6 shows the percentage of water (by volume) contained in 
the wet soil at the end of 30 days, and as would be expected, the rela- 
tively large quantity of water contained in the heavier soils. 
Table 7 gives the depth in inches to which 
the water removed from the tanks at the end 
of the specified time would cover the surface 
of the soil column if none of the water so 
added penetrated the soil. For instance, at 
the end of the third day 671 cubic inches of 
water had been removed from tank 19. This 
quantity of water is sufficient to cover a 10- 
inch by 10-inch area to a depth of 6.71 inches. 
In the same way the other figures of the 
table have been determined. If the area of the flume had been 1 
acre instead of 100 square inches there would have been removed from 
the tank sufficient water to have covered the acre to a depth of 6.71 
inches, or. expressed in irrigation terms, there would have been re- 
moved from the tank 6.71 acre-inches in the three days. 
Flume. 
Percentage 
of water. 
19 
21.82 
43 
28. 80 
63 
50.02 
80 
20.55 
100 
29.60 
209 
14.60 
