New fertilizer materials
By: by Albert R. Merz
Edition: Rev. 1940.
Series: Circular / United States Department of Agriculture -- no. 185 rev. 1940; Circular (United States. Dept. of Agriculture) -- no. 185 rev.
Publisher: U.S. Dept. of Agriculture
Published: 1940
Place of publication: Washington, D.C
Language: eng
Number of pages: 16
Subjects: Nitrogen fertilizers; Fertilizers
Notes: Caption title.