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Published in Soil Sci Soc Am J 38:676-678 (1974)
© 1974 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Difficult Eroded Planting Sites in North Mississippi Evaluated by Discriminant Analysis1

Paul D. Duffy and D. C. McClurkin2

ABSTRACT

A discriminant analysis of physical and chemical characteristics of the upper 23 cm of the soil was computed for 24 sites where bar-planted loblolly pines (Pinus taeda L.) had failed and at 15 successful plantations near the fail sites. Screening of 17 soil properties indicated that bulk density is the best variable for classifying sites. A function based only on bulk density correctly classified 74% of the sites as fail or success, regardless of microrelief. On sites where bulk density equaled or exceeded 1.45 g/cm3 bar planting was predicted to fail. Information on a site's proximity to the rim or bottom of a deep gully improved accuracy of classification. Since other soil properties differed relatively little between success and fail sites, results suggest that high bulk density substantially contributed to pine mortality, either through physical impedance of root growth or poor aeration or by interference with proper planting.

NOTES

1 Contribution from the Forest Hydrology Laboratory maintained at Oxford, Miss. by the Southern Forest Exp. Sta., Forest Service, USDA, in cooperation with the University of Mississippi. Paper presented before Div. S-7, Soil Science Society of America, 12 Nov. 1973. Las Vegas, Nev.

2 Associate Soil Scientist and Principal Soil Scientist, respectively, Oxford, Miss. 38655.

Received for publication December 14, 1973. Accepted for publication April 29, 1974.






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Copyright © 1974 by the Soil Science Society of America.