The use of phosphorus on Oregon soils
By: C.V. Ruzek.
Contributors: Oregon Agricultural College. Extension Service.; Oregon Agricultural College. Dept. of Soils.
Series: Circular -- no. 161a.; Circular (Oregon Agricultural College. Extension Service) -- 161.
Publisher: Oregon Agricultural College, Extension Service, Dept. of Soils
Published: 1919
Place of publication: Corvallis, OR
Language: eng
Subjects: Soils -- Phosphorus content -- Oregon.; Phosphatic fertilizers -- Oregon.
Notes: Caption title.

"December 1919."