Oct. 9. 
51 
Nitrifying Powers of Humid and Arid Soils 
■Table I. —Comparison of the nitrification in soils from various States —Continued. 
Soil nitrogen 
(Group I). 
Soil nitrogen 
and sulphate of 
ammonia 
(Group II). 
Soil nitrogen and 
dried blood 
(Group III). 
Soil nitrogen 
and cotton¬ 
seed meal 
(Group IV). 
State. 
Soil type. 
Nitrate nitro¬ 
gen produced. 
f 
IS 
Nitrogen in 
soil nitrified. 
Nitrate pro¬ 
duced. 
Total nitrogen 
present. 
Nitrogen nitri¬ 
fied. 
Nitrate pro¬ 
duced. 
Total nitrogen 
tvresent. 
1. 
P 
I 
Nitrate pro¬ 
duced. 
Total nitrogen 
present. 
Nitrogen nitri¬ 
fied. j 
Georgia . 
Cedi loam. 
Mg . 
9 -8s 
18.80 
Mgm . 
27.80 
177.60 
Per 
ct. 
35 + 
10-i- 
Mg . 
6.85 
28.80 
Mgm . 
67.80 
Per 
ct. 
10+ 
Mg . 
2.85 
Mgm . 
139.80 
Per 
cent. 
1+ 
Mg . 
11.85 
Mgm . 
74.80 
Per 
ct. 
15+ 
Guam. 
217.60 
13+ 
35* 80 
309. 
60 
11+ 
30.80 
224.60 
13+ 
Idaho. 
Siit ioam... 
12.05 
152.40 
7 + 
5*25 
192.40 
2+ 
25.25 
284.40 
8+ 
18.25 
199.40 
9 + 
Illinois. 
Marshall silt loam 
32.00 
219.60 
14+ 
4.00 
259.60 
1+ 
27.00 
351 * 
60 
8+ 
15*00 
266.60 
5 + 
Indiana. 
Miami silt loam.. 
8.42 
in. 80 
7 + 
is* 42 
151.80 
10+ 
33*42 
243 * 
80 
13+ 
20.42 
158.80 
12 + 
Iowa. 
Wisconsin drift... 
17.40 
146.80 
11+ 
3*50 
186.80 
1+ 
61. 50 
278. 80 
22-f 
14.50 
193*80 
7 + 
Kansas. 
Oswego silt loam. 
Lexington lime- 
24JO 
177.60 
t! 3 + 
6.10 
217.60 
2+ 
30.50 
309.60 
9+ 
17- so 
224.60 
7 + 
Kentucky. 
4 - 
149.60 
2+ 
*95 
189.60 
Tr. 
23-95 
281. 60 
8+ 
n -95 
196.60 
6+ 
T^nisiana. 
stone soil. 
Orangeburg sandy 
4-35 
64.20 
6+ 
•75 
104.20 
Tr. 
•55 
186. 20 
Tr. 
21.95 
hi. 20 
19+ 
Maine. 
loam. 
Aroostook loam.. 
*6.05 
148.20 
10+ 
11.25 
188.20 
5 + 
31-25 
280. 20 
11+ 
20. 25 
195 * 20 
10+ 
Maryland. 
Sassafras clay 
13*98 
72.60 
22+ 
7.38 
112.60 
6+ 
18. 78 
204.60 
9 + 
io- 78 
119.60 
9 + 
Massachusetts.. 
loam. 
Poduhk fine 
7.88 
151.00 
5 + 
12.88 
191.00 
6+ 
17.88 
283.OO 
6+ 
19.88 
198.00 
10+ 
Michigan. 
sandy loam. 
Miami sandy 
17.40 
112.5 
iS+ 
6.40 
152.5 
4+ 
31.40 
244. 50 
12+ 
14.40 
159-50 
9 + 
Minnesota. 
loam. 
Par go day loam,. 
37-00 
316.20 
11+ 
20.00 
356.20 
5 + 
53 *oo 
448. 20 
11+ 
18.00 
363.20 
4 + 
"Loam. 
7. 70 
34- 80 
89.40 
4.70 
74.80 
129.40 
6+ 
—.30 
166.80 
4. 70 
81. 80 
5 + 
Missouri... 
Upland silt loam. 
XO. 15 
11+ 
5*75 
4 + 
26. 75 
221. 
40 
12 + 
14* 75 
136.40 
10+ 
Montana.... 
Yakima silt loam. 
18.00 
218. 20 
8+ 
11. 50 
258.20 
4+ 
35 * 50 
350 . 
20 
IO+ 
18.50 
265. 20 
6+ 
Nebraska. 
Fine sandy loam. 
39-30 
76.80 
51+ 
14.30 
im. 80 
12+ 
•30 
20. 80 
Trace. 
20.30 
123.80 
16+ 
Clay loam. 
15-00 
I 3 -S 7 
67.00 
2x1.20 
22+ 
4.00 
5*57 
107.00 
251.20 
3 + 
2+ 
22.00 
199 . 
OO 
11+ 
17.00 
114.00 
14+ 
3 + 
New Hampshire 
Boulder day. 
6+ 
18.57 
343 * 
20 
5 + 
9 - 97 
258.20 
New Jersey. 
New Mexico.... 
Sassafras loam..., 
5-68 
83.80 
6+ 
.68 
123.80 
Tr. 
13-68 
215.80 
6+ 
11. 68 
130.80 
8+ 
Anthony fine 
15.00 
39*00 
38 + 
12.00 
79.00 
15+ 
-1.00 
171. 
OO 
9.00 
86.00 
10+ 
New York. 
sandy loam. 
Dunkirk clay 
24.85 
160.80 
iS+ 
16.85 
200.80 
8+ 
39 * 85 
392 - 
80 
14+ 
22.85 
207.80 
10+ 
North Carolina. 
loam. 
Cedi sandy loam. 
12. 52 
40.40 
30+ 
2.87 
80.40 
3 + 
19.87 
172. 
40 
11+ 
14. 87 
87.40 
17+ 
North Dakota.. 
Clay loam. 
6.20 
279.80 
3 + 
12.00 
319.80 
3 + 
42.00 
411. 
80 
10+ 
17.00 
326.80 
5 + 
Ohio. 
Wooster silt loam 
23 - 70 
120.20 
19+ 
3*70 
160.20 
2+ 
26* 70 
252. 
20 
10+ 
14. 70 
167.20 
8+ 
OVIatinma 
Loam. 
6- 75 
13. 20 
82.40 
935 *oo 
8+ 
2. 75 
47- 20 
122. 40 
975.00 
2+ 
12. 75 
214.40 
5 + 
11. 75 
129.40 
9 + 
Oregon. 
Willamette Val- 
1+ 
4 + 
57.20 
1067.00 
5 + 
50. 20 
982.00 
5 + 
Pennsylvania... 
ley sandy loam. 
Hagerstown silt 
19.00 
127.20 
14+ 
7.00 
167. 20 
4 + 
26.00 
259 * 
20 
10+ 
17.00 
174.20 
9 + 
Rhode Island... 
loam. 
Miami silt loam.. 
8-55 
163.60 
5 + 
3*25 
203.60 
1 + 
19.25 
295 * 
60 
6++ 
12. 25 
210.60 
5 + 
South Carolina . 
Cedi sandy loam,. 
13. 20 
43.20 
30+ 
11.00 
83. 20 
12+ 
—. 20 
175 * 
20 
9 + 
19.00 
90.20 
21+ 
South Dakota.. 
Clay loam. 
19.60 
193*00 
10+ 
13.60 
233.OO 
5 + 
29. 60 
325*00 
22.60 
240.00 
9 + 
Tennessee. 
Upland loam. 
11.06 
102.00 
10+ 
4. 26 
142.00 
143.4O 
l68. 60 
3 
21. 86 
234 - 
235 - 
OO 
9+ 
14.86 
149-00 
9 + 
Texas. 
Black adobe. 
15.40 
22.90 
103.40 
128.60 
14+ 
17+ 
24.40 
28. 90 
17+ 
49.40 
40 
20+ 
19.40 
150.40 
112 + 
Utah. 
Greenville loam.. 
17+ 
48.90 
260.60 
18+ 
24.90 
175 * 6oji4+ 
Vermont. 
Sandy loam. 
8-8o 
85. 20 
95 *oo 
10+ 
2. 80 
125 . 2 C 
135*00 
2+ 
25.80 
217 . 
20 
11+ 
14.80 
132. 20 11+ 
Virginia. 
Hagerstown loam 
15.20 
16+ 
6. oc 
4+ 
27.00 
227.OO 
11+ 
18.00 
142.00 
12 + 
Washington.... 
Shot clay. 
6.60 
41. 80 
15 + 
2.6c 
87.8c 
2 + 
35 * 8 o 
173 * 
80 
20+ 
9. 00 
94.80 
9 + 
West Virginia.. 
Meigs sandy loam 
7.84 
184.60 
4 + 
i* 44 
224.6c 
Tr 
9.84 
316.6c 
3 + 
6.04 
231.6c 
2+ 
Wisconsin. 
Carrington sandy 
16. 50 
174.80 
9 + 
11.5c 
214.8c 
5+ 
28. 5c 
306.80 
9 + 
22.50 
221.80 
10+ 
Wyoming. 
loam. 
Loam. 
15*15 
99 . 20 
r 5 + 
24 -iS 
139* 20 
17+ 
57*15 
231 
20 
24+ 
27*15 
146.20 
18+ 
Before discussing nitrification proper it is of importance to note the 
conditions which obtain in the foreign soils with respect to total nitrogen 
content. This consideration is important because it emphasizes what 
has been only vaguely appreciated in the past—namely, the great dis¬ 
crepancy between the nitrogen content of humid and of arid soils. More¬ 
over, it is important because the soil’s total nitrogen content may have 
a bearing on the absolute quantities of nitrates produced through the 
