Estimation of available phosphorus in soils by extraction with sodium bicarbonate
By: by Sterling R. Olsen ... [et al.].
Series: Circular / United States Department of Agriculture -- no. 939; Circular (United States. Dept. of Agriculture) -- no. 939.
Publisher: U.S. Dept. of Agriculture
Published: 1954
Place of publication: Washington, D.C
Language: eng
Number of pages: 19
Subjects: Soils; Phosphorus content
Notes: Cover title.

Issued also as Colorado Agricultural Experiment Station Scientific journal series no. 418.

Bibliography: p. 18-19.