New fertilizer materials
By: by Albert R. Merz
Series: Circular / United States Department of Agriculture -- no. 185; Circular (United States. Dept. of Agriculture) -- no. 185.
Publisher: U.S. Dept. of Agriculture
Published: 1931
Place of publication: Washington, D.C
Language: eng
Number of pages: 15
Subjects: Nitrogen fertilizers; Fertilizers
Notes: Caption title.

"Contribution from Bureau of Chemistry and Soils."