3 ° The Colorado Experiment Station. 
river bank. The trees were not only old, they were also large, 
some of them measuring fifteen inches in diameter, and the owner 
stated that he had gathered from them crops of fifty boxes to the 
tree. The soil is a light sandy loam with a decidedly sandy sub¬ 
soil, underlaid by gravel at a depth of from six to eight feet. We 
dug a hole five feet deep eight days after irrigation and found the 
ground only fairly moist. The drainage of this land is so free 
that when the northern part of it is irrigated freely a well in the 
southern part will show a rise of water within a few hours, less 
than twenty-four, and falls quickly. 
After the dead trees were removed the land was prepared for 
planting to some crop. It appeared to be in the most excellent 
condition. Corn was subsquently planted but the stand obtained 
was very poor indeed. The owner attributed this to the quality 
of the seed which he said appeared to be good but it did not come 
up. I dug up samples of the seed corn which were thoroughly 
preserved, the grains were full, plump, fine-looking ones and 
there was an abundance of moisture to permit germination. This 
soil was brown and mealy on the surface. A sample was taken 
at this place where the corn had failed to come up and an analysis 
of it will be given later. This land continued to become more 
and more mealy and the remaining portion of the orchard became 
involved to a greater extent as the season passed, till, by the 
middle of September, at least one-half of the total area, five acres 
or more, was decidedly brown, and a further number of these old 
apple trees were affected. The corn crop was a complete failure. 
The sample taken, 989, represented the surface soil of a consider¬ 
able area and was made by taking portions at various places, mixing 
as thoroughly as possible and then cutting it down to a manageable 
size; the depth of the soil represented is four and a half inches. 
The water-soluble equalled in No. 989, 2.884; in No. 892, 2.398; 
in No. 1074, 3.909, and in No. 989a, 6.96 percent of the air-dried 
soil. 
ANALYSES 
XXXIV 
XXXV 
XXXVI 
XXXVII 
Water-Soluble 
Water-Soluble 
Water-Soluble 
Water-Soluble 
laboratory 
laboratory 
Laboratory 
Laboratory 
No. 982 
No. 989 
No. 989a 
No. 1074 
July 19, 1910 
July 11, 1910 
Sept. 12, 1910 
May 7, 1911 
Percent 
Percent 
Percent 
Percent 
Calcic sulfate .... 
. 30.263 
24.664 
8.756 
37.982 
Calcic chloric! . . . 
. 5.888 
9.298 
14.117 
Maernesic sulfate 
1 7 9 A 
Magnesic chlorid 
. 14.930 
15.217 
9.217 
1. 4 6 0 
10.817 
Potassic chlorid . 
. 3.190 
2.861 
1.632 
3.898 
Sodic chlorid .... 
. 41.757 
43.832 
60.219 
35.135 
Sodic nitrate .... 
. 3.605 
3.033 
5.906 
9.889 
Iron and Aluminic 
oxids... 0.152 
0.138 
0.084 
0.087 
Silicic acid . 
. 0.215 
0.232 
0.069 
0.466 
Carbon . 
0.725 
100.000 
100.000 
100.000 
100.000 
