By Mary A. Sego
Primary Creator: Stephenson, R. E.
Extent: 1.0 Folders. More info below.
Subjects: Purdue University--Alumni and alumnae
Access Restrictions: Collection is open for research.
Preferred Citation: MSA 220, R. E. Stephenson papers, Archives and Special Collections, Purdue University Libraries
Stephenson, R. E. (1918). The Effect of Organic Matter on Soil Reaction. Reprinted from Soil Science, vol. VI, no. 6, December 1918, pp. 413-439.
Stephenson, R. E. (1918). Soil Acidity Methods. Reprinted from Soil Science, vol. VI, no. 1, July 1918, pp. 33-52.
Stephenson, R. E. (1920). Nitrification in Acid Soils, Research Bulletin No. 58. Ames, Iowa: Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts.