924 Journal of Agricultural Research vo 1 . xxiv » no.ii 
TablB 'K.-^orrelation between reaction and presence of Azotohacter in soils of Series III 
Ph detennined electrometrically. 
Ph determined colorimetrically. 
SoilNa 
Ph. 
Azoto- 
bacter. 
Soil No. 
Ph. 
Azoto- 
bacter. 
Soil No. 
Ph. 
Azoto- 
bacter. 
Soil No. 
Ph. 
Azoto^ 
bacter. 
232... 
8.31 
+ 
239... 
6.08 
+ 
257-•• 
7.8 
+ 
173 -•• 
6.0 
+ 
213... 
8.30 
173 •• 
6.08 
+ 
300 . . . 
7.6 
+ 
194... 
6.0 
+ 
200... 
8.28 
+ 
199... 
6.07 
313... 
7.6 
+ 
251... 
6.0 
— 
258... 
,8.26 
+ 
162... 
6.02 
358... 
7.6 
4 - 
170... 
5.9 
4 
231... 
8.25 
+ 
205.,. 
6.02 
• + 
202... 
7-4 
4 - 
181... 
5-9 
4 
202... 
8.19 
250... 
6.00 
+ 
231... 
7-4 
4 - 
198.. 
5-9 
— • 
234... 
8.15 
+ 
201... 
5-98 
— 
232 ... 
7-4 
-h 
199... 
5-9 
4 
257• - • 
8.13 
+ 
163... 
5.98 
+ 
234... 
7-4 
+ 
225... 
59 
4 
275••• 
8.06 
+ 
170,.. 
5-93 
+ 
264... 
7-4 
+ 
242... 
5.9 
— 
278. . . 
7-99 
+ 
225... 
5-91 
+ 
272... 
7-4 
4 - 
250... 
5-9 
4 
214. .. 
7.98 
4 - 
246... 
590 
- 
275 -•• 
7-4 
4 - 
261... 
5-9 
207. . . 
7*94 
+ 
174... 
5-85 
278... 
7-4 
+ 
174... 
5-8 
— 
255 -•• 
7-79 
261... 
S.81 
— - 
214... 
7-3 
4 - 
179... 
5.8 
272... 
7.72 
195... 
5.80 
186... 
7.2 
4 - 
195... 
5.8 
— 
186... 
7.72 
179... 
5.76 
— 
208... 
7.2 
+ 
204... 
5.8 
— 
208... 
7.60 
+ ' 
166... 
5-71 
— 
255 -•• 
7.2 
4 -. 
227... 
5.8 
— 
229... 
7.60 
227. .. 
5.66 
' — 
207... 
7.1 
4 - 
246... 
5.8 
— 
197,.. 
7-57 
+ 
238... 
5-54 
— 
229... 
7-1 
-1- 
162... 
5.7 
4 
264... 
7.52 
+ 
165... 
5-54 
— ^ 
203... 
7.0 
4 " 
164.. 
' 5.7 
. — 
224... 
7-52 
+ 
209..« 
5-53 
233 -•• 
7.0 
4 - 
191... 
5.7 
'T 
260... 
7.48 
— 
188... 
5-52 
+ 
260... 
7.0 
— 
206... 
5.7 
233 *•• 
7-47 
189... 
5 52 
183... 
6.9 
4 - 
. 209 ... 
5.7 
216... 
7.40 
+ 
^42... 
5*51 
216... 
6.9 
4 . 
238... 
5.7 
■ —’v;' 
183... 
7-37 
+ 
198... 
5*49 
224... 
248... 
5.7 
/ ' ~ ,' v 
218... 
7.28 
+ 
248... 
5*47 
• — - 
262... 
6.9 
— 
276... 
5*7 
— 
215... 
7.28 
+ 
180... 
5*47 
. 'r- 
215... 
6.7 
4 
280... 
5.7 
'4 
219... 
7-25 
— 
185... 
5-44 
— 
223... 
6.7 
4 
165... 
5.6 
— ■ 
203... 
7-25 
+ 
164... 
S- 4 I 
— 
226... 
6.7 
4 
177... 
5.6 
— ■ 
262... 
7-23 
— 
271... 
5*41 
— 
243 --- 
6.7 
— 
178... 
5.6 
— 
161.,. 
7.21 
212... 
5-39 
— 
193... 
6.6 
4 
180... 
5.6 
— 
226... 
7-13 
+ 
177... 
5-37 
— ' 
197... 
6.6 
4 
185... 
5.6 
— 
240... 
7-03 
+ 
252... 
5-37 
— 
218... 
6.6 
4 
188... 
5.6 
4 
230... 
6.98 
247... 
5-37 
— 
219... 
6.6 
189... 
5.6 
— 
243... 
6.96 
— 
190... 
5-34 
—- 
221... 
6.6 
4 
190.., 
5.6 
— 
274... 
6.96 
+ 
206... 
5-32 
— 
230... 
6.6 
4 
192... 
' 5‘6 
■ — 
182... 
6.90 
— 
I9I... 
5-32 
— 
240... 
6.6 
4 
212... 
5-6 
— 
193... 
6.84 
+ 
236... 
5-30 
— 
161... 
6.S 
4 
217... 
5.6 
4 
279... 
6.81 
— 
178... 
5-30 
— 
176... 
6.5 
4 
228... 
5-6 
— 
184... 
6.77 
+ 
i 75 *- 
5-29 
— 
222... 
6.5 
4 
236... 
5-6 
, — 
222... 
6.69 
+ 
276... 
5-27 
— 
235 --- 
6.5 
4 
252... 
5-6 
— 
187... 
6.69 
+ 
192... 
5.22 
— 
259... 
6.5 
4 
271... 
5.6 
— 
235 - •• 
6.66 
+ 
244... 
5-22 
— 
273 -•• 
6.5 
— 
166... 
5.5 
221... 
6.66 
+ 
228... 
5-20 
— 
274... 
6.5 
4 
237.•• 
5.5 
— 
223... 
6.63 
+ 
168... 
S-I 7 
— 
184... 
6.4 
4 
263... 
5.5 
— 
245••• 
6.54 
— 
217... 
5 -iS 
+ 
220... 
6.4 
4 
247... 
5-5 
— 
280... 
6.51 
+ 
171... 
5-15 
+ 
241..«. 
6.4 
4 
168... 
5-4 
— 
259... 
6.*49 
+ 
249... 
5-12 
— 
^ 3 --- 
6.4 
4 
171... 
5-4 
4 
273 • •• 
6.42 
— 
277... 
5-10 
— 
279,.. 
6.4 
— 
175 -•• 
5.4 
— 
256... 
6.35 
— 
204... 
5*10 
— 
182... 
6.2 
— 
196... 
- 5-4 
— 
176... 
6.35 
+ 
211... 
5-10 
— 
187... 
6.2 
4 
249... 
5-4 
— 
220... 
6.34 
+ 
169... 
5-10 
4 - 
356... 
6.2 
— 
254... 
5-4 
— 
253••• 
6.25 
+ 
210... 
5-05 
— 
167... 
6.1 
4 
277... 
5-4 
— 
167... 
6.25 
237-•• 
5.02 
— 
201... 
6.1 
— 
172... 
5.3 
— 
241... 
6.18 
+ 
172... 
5.02 
' — 
205... 
6.1 
4 
210... 
5.3 
— 
194 ... 
6.15 
+ 
263... 
4.93 
— 
239... 
6.1 
4 
211... 
5.3 
— 
251... 
6.10 
— 
196... 
4.90 
— 
245... 
6.1 
— 
169... 
5-2 
+■ 
181... 
6.10 
+ 
254... 
4.68 
163... 
6.0 
4 
244... 
5.1 
