Sources of nitrogen for fertilizers
By: P. E. Howard, C. H. Kunsman
Contributors: United States. Bureau of Chemistry and Soils; National Broadcasting Company
Published: 1929
Language: eng
Subjects: Fixation; Radio addresses, debates; Radio programs; Nitrogen fertilizers; Nitrogen
Notes: Caption title.

"A radio talk by P. E. Howard, delivered by Dr. C. H. Kunsman, Fertilizer and Fixed Nitrogen Investigations, Bureau of Chemistry and Soils, U. S. Department of Agriculture, through WRC and 31 other stations associated with the National Broadcasting Company, 2 p.m., Tuesday, August 27th.

Network: NBC ; Date: August 27, 1929

Second leaf labeled as "- 3 -"