HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Carmean, W. H. Search for Related Content PubMed Articles by Carmean, W. H. Agricola Articles by Carmean, W. H.

Black Oak Site Quality in Relation to Soil and Topography in Southeastern Ohio¹

ABSTRACT

Site quality for black oak (Quercus velutina Lam.) was studied in 135 well-stocked, even-aged, undisturbed stands located in the unglaciated hill country of southeastern Ohio. Multiple regression analysis showed the following, for medium-textured, well-drained soils: (i) site index increases with increased depth of surface soil (A1 + A2 horizons); (ii) site index decreases with increased amounts of stone in the subsoil (B1 horizon); (iii) better site index occurs on lower slopes and in coves while poorer sites are generally found on upper slopes and ridges; and (iv) better sites occur on north- and east-facing slopes while poorer sites occur on south- and west-facing slopes. For fine-textured soils with restricted internal drainage: (i) site index increases with increased depth of surface soil (A1 + A2 horizons); (ii) poorest sites occur in areas having the finest textured subsoils; and (iii) site index increases with increased steepness of slope. Multiple-regression equations accounting for about 80% of the variance in tree height are presented for each of these soil groups. Site-prediction tables based on these equations are given for estimating the site index of black oak on the forested uplands of southeastern Ohio.

¹ Contribution from the Athens Research Center of the Central States Forest Exp. Sta. maintained at Athens, Ohio by the Forest Service, USDA in cooperation with Ohio University. Presented before Div. S-7, Soil Science Society of America, Nov. 21, 1963, at Denver, Colo.

² Soil Scientist, Central States Forest Experiment Station, Forest Service, USDA, Athens, Ohio.

Received for publication September 8, 1964. Accepted for publication January 14, 1965.