Changes in Stem Quality on Young Thinned Hardwoods
Changes in Stem Quality on Young Thinned Hardwoods

Author: David L. Sonderman

Publisher:

Published: 1986

Total Pages: 12

ISBN-13:

DOWNLOAD EBOOK

S2Describes changes in limb-related defects on 18-year-old, even-aged hardwoods 6 years after thinning. Stocking levels of 30, 45, and 60 percent were studied. There were fewer defects per square foot of surface area in the higher stocking plots than in the lower stocking plots. The average number of live limbs decreased by 83 percent in the unthinned plots and increased slightly in the heavily thinned plots. The results show that the frequency and size of limb-related defects are affected by stand density over a short period of time.S3.

Stem-quality Changes on Young, Mixed, Upland Hardwoods After Crop-tree Release
Stem-quality Changes on Young, Mixed, Upland Hardwoods After Crop-tree Release

Author: David L. Sonderman

Publisher:

Published: 1987

Total Pages: 12

ISBN-13:

DOWNLOAD EBOOK

"Relative change of several types of stem defects was studied over an 8-year period to determine the effects of crop-tree thinning on the development of tree quality. Special interest was given to changes in relative quality associated with defect indicators of crop trees compared to trees in unthinned plots. The relative quality classes of the crop trees went from "poor" to "medium" for red maple and "poor" to "good" for aspen. The oaks stayed in the poor classification and yellow-poplar remained unchanged in the medium classification. Results showed a decrease in the number of epicormic branches on the crop trees, and an increase in the size of live limbs.S3.

Changes in Hardwood Growing-stock Tree Grades
Changes in Hardwood Growing-stock Tree Grades

Author: David L. Sonderman

Publisher:

Published: 1987

Total Pages: 12

ISBN-13:

DOWNLOAD EBOOK

S2Describes changes in provisional tree grades for 351 young, mixed upland hardwood trees 6 years after thinning. Treatments of 30, 50, and 70 percent stocking plus a crop-tree release were applied. Results indicate that light thinning and crop-tree thinning produced higher quality and better grade trees than heavy thinning.S3.