Date of this Version


Document Type



Peterson, H.B. and Goodding, T.H. (1941) The geographic distribution of Azotobacter and Rhizobium meliloti in Nebraska soils in relation to certain environmental factors (Research Bulletin: Bulletin of the Agricultural Experiment Station of Nebraska No. 121)


ISSN 0097-1452


In this investigation a survey of Nebraska soils has been made in order to determine the distribution of the aerobic nonsymbiotic and symbiotic nitrogen fixers of the genera Azotobacter and Rhizobium respectively. In connection with this survey, some of the characteristics of the soils which may bring about this distribution were studied. Up to this time practically no research has been reported on the microflora of the soils of Nebraska. Hence there is little basis for predicting the activity of these organisms under environmental conditions as they exist here. It is hoped that this work will not only supply some information of value in directing future agricultural activities, but will be of aid in stimulating and directing further biological and chemical studies.