8 BULLETIN 1221, U. S. DEPARTMENT OF AGRICULTURE. 
TABLE 3.—Distribution of capillary moisture in vertical soil columns of Idaho sandy 
soil, by percentage. 
Distance! Tube | Tube | Tube | Tube || Distance’ qube | Tube | Tube | Tube 
Sater” No. 1. | IN'Os+2: No. 3. No. 4. SCAEEE. No. 1 No. 2. No.3. | No.4. 
| 
Inches. | Per cent.| Per cent.| Per cent.| Per cent. Inches. | Per cent.| Per cent.|Per cent.|Per cent. 
1 lee lig 20. 85 aN fil ein setae ees | Gas 8 1 Se ey Re 10. 01 9. 68 10. 98 9.89 
Deg Se 20. 80 21. 94 23. 06 22 Ga P| | I ee ee 9.61 9. 52 10. 58 10. 03 
Soe 7A Wa 23. 81 22. 80 PANDA baal | (ge Sea 8.61 8.55 9. 27 9.16 
2 aay ae 24. 98 23. 34 22. 80 24 UO" | SUS: 55 FS 7.97 7.99 8. 98 8.48 
i) eee 24. 67 24. 24 25. 83 2 FOo al OLAe cee e 7.41 7. 64 8.51 (far(il 
O45 pheade 22. 83 21-20 24. 86 QU SA 20a 2 eo 7.05 7.30 8.16 7.14 
deve bo. 19. 72 18. 22 20. 69 MO OQ 2a . 203 £EK 6:27. 6. 54 7.69 6. 86 
ee 18.19 16. 49 18. 53 N02 22 eee oe 5. 74 5. 89 7.34 6.15 
1 ae ge 16. 07 15. 00 17. 23 LOS 55 N2a-6 2 RE 3. 80 4.72 | 6. 36 5. 64 
HOR, 2 14. 45 13. 45 MG SH74 13.:98* || 24e6:4- texans oe cap ete ase eee] Seis 4.60 
1 mee 13. 05 13. 07 14. 58 TZ 2h Sill) Zoe Sebo eras | see = ate cece Saeeee 4950 A|E = A eee 
1s Ss. fe 12.00 11. 58 12. 56 12.61 ——— | oe c“_iycc— 
1 ee eae 11. 26 10. 43 12, 22 a Lier AlS Average 13. 80 13. 59 13. 78 15-53 1¢/ 
H4et ii +. 10. 40 9. 81 11. 52 10. 70 
| 
Figure 2 shows in diagrammatic form the data given in Table 3 
for tubes 1,2, 3,and4. Referring to the curves shown in the figure 
nN 
oO 
Percentage of Mojsture 
° 
10 
inches Above Water 
Fig. 2.—Distribution of moisture in vertical columns, Idaho sandy soil. 
the first thing that strikes the eye is the irregularity of the transverse 
lines and the high point occurring in the lmes—a short, almost hori- 
zontal stretch of the line, then a rather abrupt rise, a rather short 
rounding apex, and a rapid descent. This descent becomes less and 
less abrupt and about half-way across it becomes much more gradual 
and uniform. The apex of each profile line is observed to be on, or a 
short distance to the left of, the vertical 5-inch line. The striking 
feature of these curves is that the highest point in these lines, indi- 
cating the greatest percentage of moisture, is found, not at the lower 
end of the tube, but at an appreciable distance above. 
Referring now to Table 3, it is found that the moisture in tubes 
Nos. 1 and 2 reached a height of 23 inches; in tube No. 3, a height 
of 25 inches, and in tube No. 4, a height of 24 inches. The first two 
tubes stood 30 and 35 days, and the last two 40 and 42 days. This 
indicates that the moisture was moving upwards very slowly, as 
