Essential elements and soil amendments for plants
Subtitle: sources and use for agriculture
By: by R. C. Severson and Hansford T. Shacklette.
Contributors: Severson, R. C.; Shacklette, Hansford T.
Series: U.S. Geological Survey circular -- 1017
Publisher: s.n
Published: 1988
Place of publication: S.l
Language: eng
Number of pages: 48
Notes: "Geologic and incidental sources of elements essential for plant growth, and amendments used to improve physical properties of soils."

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