The Fixation op Nitrogen. 
ii 
affected area had been extended very noticeably and many more 
trees were dying. 
A set of soil samples was taken from this orchard May 14, 
1909, representing the surface soil, also the first, second and third 
foot. In taking these samples we dug a hole about four and one- 
half feet deep. No water was met with but we filled up the hole as 
soon as we had procured the samples and did not wait to see 
whether any water would run in or not. These samples were 
extracted with water and gave as follows, the surface soil 4.68, 
the first foot 1.86, and second foot 2.09 and the third foot 1.509 
percent soluble in water. 
ANALYSES VI VII VIII IX 
Water-Soluble 
Laboratory 
No. 784 . 
Surface Soil 
May, 1909 
Percent 
Calcic sulfate. 29.607 
Calcic carbonate . 9.679 
Calcic chlorid. 6.686 
Magnesic sulfate ... 
Magnesic chlorid. 9.72 9 
Potassic chlorid. 3.549 
Sodic chlorid . 32.834 
Sodic nitrate . 7.23 9 
Iron and Aluminic oxid. 0.145 
Manganic oxid. 0.234 
Silicic acid . 0.298 
Water-Soluble 
laboratory 
No. 785 
First Foot 
of Soil 
Percent 
69.830 
Water-Soluble 
laboratory 
No. 736 
Second Foot 
May, 1909 
Percent, 
57.250 
Water-Soluble 
laboratory 
No. 787 
Third Foot 
May, 1909 
Percent 
37.344 
5.071 
13.249 
15.311 
3.203 
3.442 
0.670 
1.736 
1.265 
1.229 
18.780 
22.601 
41.448 
0.709 
1.591 
3.402 
0 282 
0.671 
0.602 
0.314 
ANALYSES 
Insoluble . 
Silicic acid, soluble 
Sulfuric acid. 
Chlorin. 
Phosphoric acid . . 
Carbonic acid .... 
Lime. 
Magnesia . 
Sodic oxid. 
Potassic oxid. 
Fierric oxid . 
Aluminic oxid .... 
Manganic oxid (br) 
Moisture at 100° . 
Ignition . 
Sum. 
O equiv. to chlorin 
Total . 
Humus. 
Humus ash. 
Total nitrogen . . . . 
000 100.000 
100.000 
100.000 
X 
XI 
XII 
Soil 
Soil 
Soil 
laboratory 
laboratory 
laboratory 
No. 785 
No. 786 
No. 787 
First Foot 
Seeond Foot 
Third Foot 
Percent 
Percent 
Percent 
. 64.820 
66.674 
68.027 
. 5.650 
2.927 
2.131 
. 0.810 
1.282 
0.503 
. 0.890 
0.333 
0.308 
. 0.180 
0.242 
0.267 
. 7.040 
7.370 
6.636 
. 7.180 
7.730 
6.590 
. 2.190 
2.967 
2.961 
. 0.840 
0.402 
0.494 
. 0.690 
0.595 
0.661 
. 3.110 
2.890 
3.170 
. 2.250 
1.354 
2.030 
0.210 
0.220 
. 1.470 
1.260 
1.498 
. . 2.970 
(3.838) 
(4.573) 
, .100.090 
100.074 
100.069 
, . 0.200 
0.074 
0.069 
. . 99.890 
100.000 
100.000 
v. n O 
a -i a a 
, . U. X V 
. . 0.072 
0.056 
0.055 
