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Difficult Eroded Planting Sites in North Mississippi Evaluated by Discriminant Analysis
Author(s) -
Duffy Paul D.,
McClurkin D. C.
Publication year - 1974
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1974.03615995003800040039x
Subject(s) - sowing , bulk density , linear discriminant analysis , aeration , environmental science , discriminant function analysis , pinus <genus> , hydrology (agriculture) , soil science , mathematics , geology , soil water , agronomy , statistics , ecology , biology , botany , geotechnical engineering
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/cm 3 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.