The Coeorado Experiment Station. 
ANALYSES LIX 
Water-Soluble 
laboratory 
No. 791 
May 10, 1909 
Percent 
Calcic sulfate . 55.242 
Calcic chlorid .. 
Magnesic sulfate . 15.021 
Magnesic chlorid . .. 11.883 
Magnesic nitrate .. 
Potassic sulfate.. 
Potassic chlorid. 3.005 
Potassic nitrate. 10.001 
Sodic sulfate .. 
Sodic chlorid .. 
Sodic nitrate . 4.273 
Iron and Aluminic oxid. ... 0.139 
Silicic acid . 0.436 
100.000 
LX 
LX I 
LXII 
Water-Soluble 
Water-Soluble 
Water-Soluble 
laboratory 
laboratory 
laboratory 
No. 823 
No. 790 
No. 828 
July 23, 1909 
May 10, 1909 
Percent 
Percent 
Percent 
21.249 
14.495 
4.401 
14.253 
47.523 
28.313 
4.363 
18.801 
1.606 
10.792 
0.491 
2.114 
2.711 
• 35.798 
10.607 
20.585 
45.283 
16.395 
0.092 
0.128 
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 . 0.380 
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. 
