914 
Journal of Agricultural Research 
Vol. XXIV, No. II 
Tabl^ V .—Type of growth, nitrogen fixed, and reaction of soils of Series I 
Soil 
No. 
Type of film. 
Microscopic picture. 
1 . 
2 . 
Typical Azotobacter.,. 
None. 
Typical Azotobacter.... 
No Azotobacter 
3 . 
4 . 
5 . 
Typical Azotobacter... 
Typical Azotobacter.... 
6 . 
None. 
No Azotobacter 
7 . 
.do. 
8 . 
.do . 
9 . 
.do. 
lO.... 
II.... 
.do. 
12 ... . 
13•... 
14.. .. 
15.. .. 
Typical Azotobacter... 
Typical Azotobacter.... 
16.... 
None. 
No A2M)tobacter.... 
17.... 
18.... 
19.... 
20.... 
21. . . . 
.do. 
22 ... . 
23.... 
24_ 
25.. .. 
26.. .. 
Typical Azotobacter... 
Typical Azotobacter.... 
27.... 
2I... 
29.... 
30.. .. 
31 .-.. 
32.. .. 
33 .. .. 
None. 
No Azotobacter.... 
Topical Azotobacter... 
None. 
Typical Azotobacter.... 
No Azotobacter 
34...• 
.do. 
35 -... 
36.. .. 
37 --.. 
38.. .. 
39.. .. 
Typical Azotobacter... 
_do. 
Typical Azotobacter.... 
None. 
No Azotobacter.... 
Nontypical«. 
Azotobacter present«... 
.do. 
40.... 
.do. 
.do. 
41.... 
Typical Azotobacter.... 
42.... 
43 --.. 
44..•. 
Typical Azotobacter... 
.do. 
Nontypical. 
.do. 
45 -... 
46.... 
Typical Azotobacter... 
.do. 
None. 
No Azotobacter.. 
47.. .. 
48.. .. 
Typical Azotobacter... 
Nontypical. 
Typical Azotobacter.... 
.do. 
49 -... 
50.... 
None. 
No Azotobacter. 
.do. 
«;i.... 
.do. 
.do. 
52 .. .. 
53 - --. 
54 - ... 
55 - *.. 
56.. .. 
57 -.•. 
Nontypical. 
Azotobacter present 
Typical Azotobacter... 
Nontypical. 
Tppical Azotobacter.... 
.do. 
Typical Azotobacter... 
.do. 
Nontypieal. 
.do. 
Typical Azotobacter... 
a Ph not determined electrometrically. 
Nitro¬ 
gen 
fixed. 
Azoto¬ 
bacter. 
Ph 
colori¬ 
metric. 
Ph 
electro¬ 
metric. 
Mgm. 
10.3 
+ 
6.9 
2.0 
— 
5-4 
3-0 
— 
5.6 
6.8 
+ 
6.9 
5-4 
-f 
7-1 
4.4 
— 
5-7 
4.4 
— 
S -7 
4.6 
— 
5-6 
4-7 
— 
S-S 
. 
-0.6 
— 
5-6 
1*7 
— 
5.8 
4.5 
— 
5-9 
3-2 
— 
5-6 
8.5 
7-4 
10.3 
+ 
7*4 
4.0 
— 
5-6 
3-0 
-- 
5-5 
3-7 
— 
5-6 
4-5 
— 
S ‘7 
4.7 
— 
5-4 
5-10 
4-7 
— 
5-6 
5.05 
4.7 
— 
5-6 
5.27 
4.7 
— 
5-6 
5-10 
4.2 
— 
5.6 
4.90 
6.4 
+ 
7.0 
6.45 
9.9 
+ 
6.6 
6.13 
7-5 
+ 
6.1 
5.88 
9*5 
+ 
6.2 
5.86 
8.8 
+ 
7.6 
7.27 
4.1 
— 
5.6 
5.39 
10.6 
+ 
7-5 
7.71 
5.6 
— 
5-9 
5.85 
4.0 
— 
6.7 
6.56 
4.5 
— 
6.8 
6.74 
6.8 
+ 
7.6 
7.62 
9.2 
+ 
6.0 
6.12 
5-4 
— 
6.2 
6.07 
3-9 
-- 
5.6 
5-59 
8.6 
+ 
6.1 
6.05 
8.1 
+ 
7.0 
6.72 
7.6 
4 - 
6.0 
5.98 
8.3 
+ 
7.4 
7.05 
9.6 
+ 
7-7 
8.75 
9.9 
+ 
7.5 
7.71 
10.1 
+ 
7.4 
7-45 
I.O 
— 
5-9 
6.03 
10.0 
+ 
7.4 
7.52 
6.6 
+ 
6.4 
6.52 
2.7 
— 
5.5 
5.03 
4.0 
— 
5.8 
5.32 
3*2 
— 
5-3 
5.41 
5-5 
+ 
7-3 
7.27 
9.0 
+ 
7.7 
7.79 
7-4 
+ 
6.0 
6.18 
8.7 
+ 
7.5 
7.50 
7.2 
+ 
7.4 
7.18 
7.6 
+ 
7.5 
7.30 
