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Research Bulletin No. 39
February, 1916
Carbon Dioxide Production in Soils
and Carbon and Nitrogen Changes
in Soils Variously Treated
By R. S. Potter and R. S. Snyder
Loura AGRICULTURAL EXPERIMENT STATION
IOWA STATE COLLEGE OF AGRICULTURE AND
MECHANIC ARTS
AGRONOMY SECTION
Soil Chemistry & Bacteriology
CALIFORNIA
AMES, IOWA