At the present time it may be said that the process of decomposition with its resultant complex chemical changes taking place in the soil is controlled primarily by the activities of micro-organisms and that Soil Fertility is mainly dependent upon these microscopic forms.
Proceedings of the Iowa Academy of Science
©1922 Iowa Academy of Science, Inc.
"A Chemical Classification of the Activities of Soil Microorganisms,"
Proceedings of the Iowa Academy of Science, 29(1), 355-359.
Available at: https://scholarworks.uni.edu/pias/vol29/iss1/74