Abstract
Abstract At age five, disk cultivation between trees, the maximum-care treatment, produced a statistically significant height increase for sycamore (Platanus occidentalis L.), sweetgum (Liquidambar styraciflua L.), and loblolly pine (Pinus taeda L.) as compared to trees grown on minimum-care (shear and burn) plots. Volume index (dbh² x height) of loblolly pine was significantly larger with cultivation than with the minimum treatment. Fusiform rust incidence (Cronartium fusiforme Hedgc and Hunt ex Cumm.) on loblolly pine was 1.5 to 3.0 times greater on maximumcare plots than on minimum-care plots. The hardwoods on less than the maximum-care plots experienced heavy mortality and very little growth.
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