Apparent Influence of Phosphate Marl on Site Index of Loblolly Pine in the Lower Coastal Plain of South Carolina
Soil-site correlation studies in the Lower Coastal Plain of South Carolina showed wide ranges in site index of loblolly pine (Pinus taeda L.) with certain soil series. Measured site indexes were frequently higher than site indexes estimated from prediction charts prepared by Coile and Auten. The variations occurred in localized areas. These areas appeared to correspond to areas where phosphate marl was present or had been mined for phosphate. Rogers (5) and Malde (4) made detailed studies of phosphate deposits in South Carolina. These studies suggested the need for field examinations to determine whether or not phosphate marl influenced site index of loblolly pine. Field data and laboratory analysis of soil samples indicated average site index of loblolly pine on areas influenced by phosphate was 16 points higher than on areas not influenced. The study suggests phosphatic phases of these soils should be recognized in making soil surveys.
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Document Type: Journal Article
Affiliations: Woodland Conservationist, Soil Conservation Service, U. S. Dept. Agric., Columbia, S.C.
Publication date: 1963-04-01
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