hard compact soil

hard compact soil

According to OSHA: all earth materials not classified as running or unstable.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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Our sampling sites were characterized by hard compact soil. The sites had high richness of non-woody vegetation (11 herb and five grass species) followed by eight species of woody vegetation (five shrubs and three tree species) (Appendix 1).