50 
The: Colorado Expe;rime;nt Station. 
ANALYSES 
LIX 
LX 
LXI 
LXII 
Water-Soluble 
Laboratory 
No. 791 
May 10, 1909 
Percent 
Water-Soluble 
Laboratory 
No. 823 
July 23, 1909 
Percent 
Water-Soluble 
Laboratory 
No. 790 
May 10, 1909 . 
Percent 
Water-Soluble 
Laboratory 
No. 828 
Percent 
Calcic sulfate . 
Calcic chlorid . 
Magnesic sulfate . 
Magnesic chlorid . 
Magnesic nitrate . 
Potassic sulfate. 
Potassic chlorid. 
Potassic nitrate . 
Sodic sulfate . 
Sodic chlorid . 
Sodic nitrate . 
Iron and Aluminic oxid. . 
Silicic acid . 
. . 55.242 
21.249 
14.495 
47.523 
4.401 
28.313 
. . 15.021 
. . 11.883 
14.253 
4.363 
10.792 
18.801 
0.491 
1.606 
. . 3.005 
. . 10.001 
2.114 
2.711 
35.798 
10.607 
16.395 
. . 4.273 
. . 0.139 
. . 0.436 
20.585 
45.283 
0.092 
0.128 
100.000 
100.000 
100.000 
100.000 
ANALYSIS 
LXIII 
Soil 
Laboratory 
No. 791* 
May 10,1909 
Percent 
Sand . 67.910 
Silica (sol.) . 3.280 
Sulfuric acid . 0.760 
Chlorin . 0.200 
Phosphoric acid . 0.170 
Carbonic acid . 2.640 
Lime . 4.250 
Magnesia .►. 2.060 
Sodic oxid . 0.530 
Potassic oxid . 0.880 
Ferric oxid . 3.900 
Aluminic oxid . 4.400 
Manganic oxid (br.). 0.280 
Moisture, 110° . 3.510 
Ignition. 5.640 
Sum .100.410 
Oxygen equiv. to chlorin. 0.050 
Total .100.360 
Humus . 0.3 80 
Humus ash . 0.382 
This is an extremely interesting instance of the occurrence of 
nitrates. The ground slopes toward a meadow, a part of which has 
been converted into a reservoir but the land is decidedly higher 
than the meadow, as it is on the lower slope of a hill. The field 
along the roadside where one of these spots occurs was in alfalfa; 
the land was good, and the alfalfa healthy, so that one seems 
*The depth to which this sample was taken is not stated. It was 
probably about three, certainly not more than four, inches. 
