22 
The: Colorado Expe;rime:nt Station. 
had been an alfalfa field and a few of the plants were not yet en- 
tnely dead The crowns and roots showed that it had recently 
been a good stand and that the plants had been large. The water 
table was in this case within two and a half feet of the surface. 
ANALYSIS 
Sand. 
Silicic acid (sol.) 
Sulfuric acid . . . 
Chlorin .. 
Phosphoric acid 
Carbonic acid . . 
Lime . 
Magnesia. 
Sodic oxid. 
Potassic oxid . . 
Ferric oxid . 
Aluminic oxid . . . 
Manganic oxid . . 
Water at 100° . . . 
Ignition . 
XX 
Soil 
Laboratory 
No. 625 
Percent 
. 66.822 
. 11.303 
. 0.042 
. 0.703 
. 0.042 
4.458 
. 4.294 
2.339 
0.653 
0.660 
3.089 
2.005 
0.051 
1.250 
2.192 
Sum . 
Oxygen equiv. chlorin 
Total . 
100.663 
0.159 
100.504 
ANALYSIS 
XXI 
Alkali 
Laboratory 
No. 622 
Calcic sulfate . 
Magnesic sulfate 
Sodic sulfate . . . 
Sodic chlorid . . 
Sodic silicate . . . 
Ignition, etc. . . 
Percent 
6.893 
17.373 
27.868 
43.466 
0.316 
(4.384) 
100.000 
Die T’ 6 fol !° Wlng tf ! ree sam Ples are ground waters taken within 
December of T 9 o7 nS at '° n ’ ° f taken in November *nd 
