Until the present time studies in soil bacteriology have dealt almost exclusively with the occurrence and activities of microorganisms in the soil and no attempt has been made to interpret experimental results from the standpoint of crop production. This is due, of course, to the fact that as a science soil bacteriology is scarcely out of its infancy and the preliminary investigations in any science must of necessity deal mainly with underlying principles and such studies are always apt to be rather fragmentary in character.
Brown, Percy Edgar
"Bacterial activities and crop production,"
Research Bulletin (Iowa Agriculture and Home Economics Experiment Station): Vol. 2
, Article 1.
Available at: https://lib.dr.iastate.edu/researchbulletin/vol2/iss25/1