The Fixation oe Nitrogen. 
i i 
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 Water-Soluble Water-Soluble 
Water-Soluble 
laboratory 
laboratory 
laboratory 
Laboratory 
No. 784 
No. 785 
No. 736 
No. 787 
Surface Soil 
First Foot 
Second Foot 
Third Foot 
May, 1909 
of Soil 
May, 1909 
May, 1909 
Percent 
Percent 
Pproput, 
Percent 
Calcic sulfate . 
. 29.607 
69.830 
57.250 
37.344 
Calcic carbonate . 
. 9.679 
Calcic chloric!. 
. 6.686 
Magnesic sulfate . 
.- ■ 
5.071 
13.249 
15.311 
Magnesic chlorid . 
. 9.729 
3.203 
3.442 
0.670 
Potassic chlorid. 
. 3.549 
1.736 
1.265 
1.229 
Sodic chlorid . 
. 32.834 
18.780 
22.601 
43.448 
Sodic nitrate . 
. 7.239 
0.709 
1.591 
3.402 
Iron and Aluminic oxid 
. 0.145 
Manganic oxid . 
. 0.234 
— 
0.282 
Silicic acid . 
. 0.298 
0.671 
0.602 
0.314 
100.000 
100.000 
100.000 
100.000 
ANALYSES 
X 
XI 
XII 
Soil 
Soil 
Soil 
laboratory 
laboratory 
Laboratory 
No. 785 
No. 786 
No. 787 
First Foot 
Seeond Foot 
Third Foot 
Percent 
Percent 
Percent 
Insoluble . 
. 64.820 
66.674 
68.027 
Silicic acid, soluble . . 
. 5.650 
2.927 
2.131 
Sulfuric acid. 
. 0.810 
1.282 
0.503 
Chlorin. 
. 0.890 
0.333 
0.308 
Phosphoric acid . 
. 0.180 
0.242 
0.267 
Carbonic acid . 
. 7.040 
7.370 
6.636 
Lime. 
. 7.180 
7.730 
6.590 
Magnesia . 
. 2.190 
2.967 
2.961 
Sodic oxid . 
. 0.840 
0.402 
0.494 
Potassic oxid . 
. 0.690 
0.595 
0.661 
Ferric oxid . 
. 3.110 
2.890 
3.170 
Aluminic oxid . 
. 2.250 
1.354 
2.030 
Manganic oxid (br) . . 
0.210 
0.220 
Moisture at 100° .... 
. 1.470 
1.260 
1.498 
Ignition . 
. 2.970 
(3.838) 
(4.573) 
Sum . 100.090 
O equiv. to chlorin. 0.200 
100.074 
0.074 
100.069 
0.069 
Total . 99.890 
Humus. 0.248 
Humus ash . 0.19 4 
Total nitrogen. 0.072 
100.000 100.000 
0.056 
0.055 
