The Colorado Experiment Station 
2 
ANALYSES OF SOIL EXPERIMENTAL PLOT, ROCKY FORD, 
Plot liV—Sampled 20 July 1911. 
Insoluble . 
Silicic acid. 
Sulfuric acid. 
Phosphoric acid. 
Chlorin . 
Carbonic acid . 
Potassic oxid . 
Sodic oxid . 
Calcic oxid. 
Magnesic oxid . 
Ferrous oxid . 
Ferric oxid . 
Aluminic oxid . 
Manganic oxid . 
Water at 100° C. 
Ignition . 
Sum . 
Oxygen equi. to chlorin 
Total . 
Total nitrogen . 
Humus . 
Humus nitrogen on soil. 
Nitrogen in humus. 
Humus N. on total N. 
Nitric nitrogen. 
Water-soluble in soil. 
Sulfuric acid in water soluble. . . 
Calcic oxid in water soluble. 
XXVII a 
First foot 
Percent 
59.035 
13.220 
0.108 
0.188 
0.043 
2.984 
0.887 
0.727 
4.940 
1.436 
0.486 
4.248 
5.228 
0.100 
2.428 
3.628 
99.686 
0.009 
99.677 
0.1080 
0.9800 
0.0530 
5.4080 
49.0750 
0.0016 
0.3590 
Not det’d 
Not det’d 
XXVIIb 
Second foot 
Percent 
56.078 
12.220 
0.173 
0.160 
0.031 
4.592 
0.813 
0.677 
7.100 
1.257 
0.389 
4.004 
5.787 
0.100 
2.454 
3.464 
99.299 
• 0.007 
99.292 
0.0770 
0.5920 
0.0330 
5.5740 
42.8600 
0.0002 
0.3510 
Not det’d 
Not det’d 
COLO. 
XXVIIc 
Third foot 
Percent 
52.436 
16.200 
0.477 
. 0.102 
0.028 
3.212 
0.934 
0.581 
5.450 
1.630 
0.355 
4.667 
6.366 
0.150 
3.402 
3.446 
99.436 
0.006 
99.430 
0.0630 
0.5620 
0.0370 
7.0460 
62.8600 
0.0001 
1.0500 
46.5940 
24.6550 
