Essential plant food elements
By: Oswald Schreiner
Contributors: United States. Bureau of Chemistry and Soils; National Broadcasting Company
Published: 1930
Language: eng
Subjects: Soils; Radio programs; Composition; Fertilizers; Radio addresses, debates
Notes: Caption title.

"A radio talk by Dr. Oswald Schreiner, Bureau of Chemistry and soils, delivered through Station KOA, Denver, Colo., and 35 other stations associated with the National Broadcasting Company, June 11, 1930."

Network: NBC ; Date: June 11, 1930