sept. 9. 191s Variations in Moisture Content of a Loess Soil 
461 
second inch in the grass field indicates that the loss in it was due to 
transpiration, except for the slight amount fost from the first 2 inches. 
In the alfalfa field, with its more open stand of plants, the losses due to 
evaporation appear to have been greater and to have affected the soil to 
a greater depth. 
Only in the surface inch did we find a ratio lower than 1.0. In the 
fall-plowed field, which had been disked in March, the surface 2 inches of 
soil were drier on April 9 than 19 days later. 
The moisture relations are shown graphically in figure 3. The values 
for the wilting coefficients and moisture equivalents used in this have 
been computed from the hygroscopic coefficients (6, p. 72). 
Table VI .—Weather conditions at Lincoln , Nebrin the season of 1912 compared with 
the normal 
PRECIPITATION (INCHES) 
March. 
April. 
May. 
June. 
July. 
August. 
In 1912 a . 
2. 06 
2. 23 
0. 69 
4 - 03 
2. 68 
4 * 15 
Normal. 
I. 23 
2. 77 
4 25 
4 - 32 
3-«3 
3 - 7 i 
Departure.. 
• 83 
“ • 54 
- 3 - 56 
- .29 
** IS 
‘44 
MEAN TEMPERATURE (°F.) 
In 1912 . 
26 
53 
66 
68 
79 
75 
Normal. 
3 ^ 
Si 
63 
72 
76 
74 
Departure. 
— 10 
2 
3 
- 4 
3 
1 
SUNSHINE (PERCENTAGE OF POSSIBLE) 
In 1912. 
56 
62 
83 
68 
79 
74 
Normal. 
68 
66 
66 
73 
76 
74 
Departure. 
—12 
- 4 
17 
~ 5 
3 
0 
WIND VELOCITY (MILES PER HOUR) 
In 1912 . 
10 
14 
13 
9 
11 
9 
Normal. 
13 
14 
12 
10 
9 
9 
Departure. 
“ 3 
0 
1 
— 1 
2 
0 
RELATIVE HUMIDITY (PER CENT) 
In 1912. 
80 
64 
58 
63 
61 
67 
Normal. 
70 
63 
68 
69 
67 
71 
Departure. 
10 
1 
“ IO 
- 6 
- 6 
- 4 
« At University Farm. 
