Diagnostic criteria for plants and soil / Homer D. Chapman, 1973
Information trouvée : Department of soils and plant nutrition, University of California citrus research
center and Agricultural experiment station, Riverside, en 1966.
Internet, alt.obituaries, 2005-04-09
Information trouvée : Born in Darlington, Wis., in 1898 ; d. 2005-04 ; director of the University of California's
Citrus Experiment Station in Riverside and a founding faculty member at UC Riverside,