Content Type Publication : Virginia Department of Forestry

Media: Publication

No. 113 Controlling Herbaceous Competition and Tip Moth – Effects After 16 Years; by T. A. Dierauf and J. A. Scrivani

November 3, 2020 - Report describes the effects of four treatments – herbaceous vegetation control, tip moth control, herbaceous vegetation and tip moth control combined, and no treatment – on loblolly pine growth through age 16. Herbaceous control increased height by 2 feet, diameter by 0.5 inches, and basal area by 25 square feet. Tip moth control had only slight effects on those attributes.

No. 098 Loblolly Pine Release Study Report No. 23; by T. A. Dierauf

November 3, 2020 - Report summarizes findings from plots comparing release from hardwood competition by basal spraying herbicides at two dilution rates at age one to no treatment and measured through age 19. Cordwood yield response varied from +22% on the lower dilution rate to -17% with the higher dilution.

No. 099 Loblolly Pine Release Study Report No. 24; by T. A. Dierauf

November 3, 2020 - Report summarizes findings from plots comparing release from hardwood competition by aerial application of herbicides at age three to no treatment and measured through age 20. Herbicide plots averaged 11% more basal area and 18% more volume than check plots.

No. 100 Loblolly Pine Release Study Report No. 25; by T. A. Dierauf

November 3, 2020 - Report summarizes findings from plots comparing release from hardwood competition by aerial application of herbicides at age two to no treatment and measured through age 18. Herbicide plots averaged 169% more basal area and 215% more volume than check plots.

No. 101 Loblolly Pine Release Study Report No. 26; by T. A. Dierauf

November 3, 2020 - Report summarizes findings from plots comparing release from hardwood competition by aerial application of herbicides at age three to no treatment and measured through age 19. Herbicide plots averaged 22% more basal area and 38% more volume than check plots.

No. 102 Loblolly Pine Release Response to Complete Elimination of Understory Vegetation; by T. A. Dierauf

November 3, 2020 - Report provides information regarding loblolly pine growth through age 18 on plots released from understory (blueberry and huckleberry) vegetation at age 10. Complete elimination of understory competition had no significant impact on diameter or basal area growth.

No. 103 A Three-Year Loblolly Pine Direct Seeding Study: Yields at Age 24; by T. A. Dierauf

November 3, 2020 - Report provides age 24 pulpwood yields on plots of a three-year study of eight direct seeding treatments (two rates x four sowing dates). Yields at age 24 ranged from 6.6 to 29.1 cords per acre, considerably less than would be expected from plantations at the same age.

No. 104 Lateral Roots Extending From the Planting Hole – How Serious?; by T. A. Dierauf

November 3, 2020 - Report provides three-year results from a study of effects of exposed long roots on planted loblolly pine seedlings. Lateral roots extending from the planting hole and exposed on the surface did not reduce survival or subsequent height growth.

No. 105 Stripping Lateral Roots From Loblolly During Lifting; by T. A. Dierauf, L. A. Chandler, and D. L. Hixson

November 3, 2020 - Report provides three-year survival results of loblolly pine seedlings with no root damage, all lateral roots removed, and all lateral roots removed plus taproot damage. Most of the seedlings with roots removed died, while survival of undamaged seedlings was satisfactory.

No. 106 A Three-year Loblolly Pine Interplanting Study on Site-Prepared Forestland; by T. A. Dierauf

November 3, 2020 - Report provides 20-year results of a study comparing planting 824 trees per acre, 412 trees per acre, and 412 trees per acre followed by interplanting another 412 trees the following year. Interplanting had a negative effect on stand productivity, reducing average stem diameter and increasing the number of sub-merchantable trees.

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Virginia Department
of Forestry