Masters Theses

Date of Award

12-2000

Degree Type

Thesis

Degree Name

Master of Science

Major

Forestry

Major Professor

John C. Rennie

Committee Members

David Buckley, Vernon Reich

Abstract

Loblolly pine (Pinus taeda) was planted at nine locations across Tennessee in 1993-94 and 1994-95 using a customized fractional factorial design. Two sites, good and poor, were chosen at each location to compare soil effects on height and survival. At each site three treatments were evaluated: spacing (8X8, 8X10, and 10X10 feet), herbicide (2.0 oz/ac Oust and 4.0 oz/ac Arsenal), fertilization at planting (three, 9 gm fertilizer tablets per tree (22-8-2)). After the fifth growing season, height measurements and survival counts were taken.

The least square estimate of mean overall height and survival at good and poor sites combined after five growing seasons was, 12 feet and 84 percent, respectively. Results after five growing seasons indicate that herbicide increased tree height by 8 percent on the good and poor sites combined. Survival increased 13 percent when herbicide was used at good and poor sites. There were significant differences found between experiment stations at (P<0.05). Mean height estimates for stations after five growing seasons ranged from 9.5 feet at the West Tennessee Experiment Station to 13.5 feet at Ames Plantation. Survival ranged from 59 percent at the Dairy Experiment Station to 99 percent at the Highland Rim Forestry Experiment Station. There were also significant differences (P<0.05) found between mean survival estimates for site by herbicide at good and poor sites combined.

Files over 3MB may be slow to open. For best results, right-click and select "save as..."

Share

COinS