Browsing Extension Service -- Bulletins / Extension Bulletins by Author "Warner, Leroy E."

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Nitrogen fertilizers

Oregon State College. Federal Cooperative Extension Service; Warner, Leroy E.; King, Arthur S. (Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1950-02)
Nitrogen fertilizers (Revised June 1951)

Oregon State College. Federal Cooperative Extension Service; Warner, Leroy E.; King, Arthur S. (Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1951-06)