Browsing Agricultural Experiment Station -- Station Circulars by Author "Torgerson, E. F. (Edward Fritchoff), 1888-"

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Identification and productivity of western Oregon soil types

Powers, W. L. (Wilbur Louis), b. 1887; Torgerson, E. F. (Edward Fritchoff), 1888-; Dannen, E. V. (Eugene Verle), 1914-; Oregon State College. Agricultural Experiment Station (Corvallis : Agricultural Experiment Station, Oregon State College, 1948)
Meaning and use of Willamette soil survey

Torgerson, E. F. (Edward Fritchoff), 1888-; Powers, W. L. (Wilbur Louis), b. 1887; Oregon State Agricultural College. Agricultural Experiment Station ([Corvallis, Or.] : Agricultural Experiment Station, Oregon State Agricultural College, 1928-12)