Soil factors influencing crop production in the Arkansas Valley, Colorado
By: A.T. Sweet
Series: Circular / United States Department of Agriculture -- no. 55; Circular (United States. Dept. of Agriculture) -- no. 55.
Publisher: U.S. Dept. of Agriculture
Published: 1928
Place of publication: Washington, D.C
Language: eng
Number of pages: 25
Subjects: Soil fertility
Notes: Cover title.

"Contribution from the Bureau of Chemistry and Soils."