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sii 
Reaction and the Growth of Azotobacter 
elation between soil type , condition of soil , growth of Azo 
fixed per 50 cc. 0/ culture , awJ reaction of soil solution 
Soil type.** 
Condition of 
ground. 
Type of 
growth. 
Wabash silt loam. 
Colluvial Marshall silt loam. 
Marshall silt loam. 
Oswego silt loam. 
Marshall silt loam. 
.do. 
.do. 
.do. 
.do. 
.do..... 
.do. 
.do. 
.do,. 
Oswego silt loam. 
.do. 
Summit Silt loam. 
.do. 
Marshall silt clay loam. 
.do.... 
.do. 
.do. 
.do. 
.do. 
Oswego silt loam. 
Wabash silt clay loam. 
.do.. 
.do.. 
.do. 
Marshall silt clay loam. 
Wabash silt loam. 
Laurel silt loam,. 
Colluvial Summit silt loam.. 
.do. 
Summit silt loam. 
Stony loam. 
(?) Silt loam-. 
Wabash clay loam. 
Wabash silt clay loam. 
.do. 
Summit silt loam. 
Marshall silt loam. 
Wabash silt loam. 
Laurel silt clay loam. 
Laurel very fine sandy loam. 
.do. 
Laurel fine sandy loam. 
Laurel very fine sandy loam. 
.do. 
Marshall clay loam. 
Marshall silt loam. 
.do. 
Summit silt loam. 
Marshall silt loam. 
Colluvial Summit silt loam . 
.do. 
Summit silt loam. 
Oswego silt loam. 
Summit stony loam. 
Summit silt loam. 
Oswego silt loam. 
Wabash silt clay loam...... 
(?) silt loam. 
Summit silt loam. 
.do. 
Marshall silt loam. 
.do. 
Wabash silt loam. 
Oswego silt loam. 
Marshall silt loam. 
.do. 
Wabash silt loam. 
Wabash silt clay loam. 
Osage silt loam. 
.do. 
Cultivated.... 
Forest. 
Cultivated 
Sod. 
Alfalfa. 
Cultivated.... 
Alfalfa. 
.do.. 
.do. 
.do. 
.do. 
.do. 
Cultivated.... 
Forest. 
.do. 
Cultivated.... 
Pasture sod... 
Cultivated.... 
.do. 
.do. 
.do. 
.do. 
.do. 
Alfalfa.. 
Cultivated.... 
Alfalfa. 
Cultivated.... 
.do. 
Brook bottom. 
Pasture sod... 
Cultivated.... 
Alfalfa. 
Orchard. 
Alfalfa. 
Pasture sod... 
Cultivated.... 
.do. 
.do. 
Orchard. 
Cultivated.... 
Alfalfa. 
Cultivated.... 
.do. 
.do. 
Orchard....... 
Sod. 
Hedge... 
Roadside. 
Cultivated.... 
Alfalfa. 
Pasture sod... 
Forest. 
.do. 
Orchard. 
Cultivated.... 
Alfalfa. 
Cultivated.... 
Pasture sod... 
Cultivated.... 
Ravine. 
Cultivated.... 
Forest. 
Cultivated.... 
.do. 
Orchard. 
Alfalfa. 
Cultivated.... 
.do. 
.do. 
Alfalfa. 
Cultivated.... 
Pasture. 
Creek bank. .. 
Cultivated.... 
Typical. 
None. 
.do. 
Nontypical. 
.do. 
None. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.....do. 
Typical.... 
.do. 
None. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
Nontypical. 
Typical.... 
Nontypical. 
Typical.... 
Nontypical. 
None. 
Typical.... 
None. 
.do. 
.do. 
Nontypical. 
.do. 
None. 
Nontypical. 
.do. 
.do. 
.do..... 
.do. 
Typical.... 
Nontypical. 
Typical. 
None. 
Typical.... 
Nontypical. 
None. 
.do. 
.do. 
Nontypical. 
Typical. 
Nontypical. 
Typical.... 
Nontypical. 
.do.. ... 
None. 
Typical.... 
None. 
.do. 
Typical.... 
.do. 
.do. 
None. 
.do. 
.do. 
Nontypical. 
None. 
Typical..,. 
Nontypical. 
.do. 
None. 
Nontypical. 
indebted to Prof. R. I. Throckmorton, of the Department of Agron 
Where the question mark (?) is used, it was impossible to id 
