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.
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.
November 3, 2020 - Report summarizes 20-year growth of loblolly pine in studies comparing small, average, and large initial root collar diameter. Large seedlings survived only slightly better than average seedlings, but small seedlings suffered considerable mortality. Even if small seedlings had survived as well as the others, they would have produced significantly less volume.
November 3, 2020 - Report provides three-year results comparing seedlings ranging in root collar diameter from 2/32 to 6/32 inches. Age 25-26 growth data are also reported but are difficult to interpret because the original planting was at a 3 x 3 feet spacing.
November 3, 2020 - Report summarizes 20-year growth of yellow-poplar as affected by initial root collar diameter.
November 3, 2020 - Report provides results from a series of trials comparing three sawdust rates, three nitrogen rates, and top clipping on loblolly pine seedling development. After three seasons, there were no consistent effects on survival or height. Top clipping consistently improved survival.
November 3, 2020 - Report provides results of two studies of the effects of mycorrhizae on loblolly pine seedling performance. Results did not identify any significant differences between non-mycorrhizal and mycorrhizal seedlings.
November 3, 2020 - Report compares yields on 34 pairs of plots planted in 1966 and 1967, which shows that loblolly out-produced Virginia pine on 33 out of 34 locations and at age 19-21 most loblolly plots were ready for thinning while none of the Virginia pine plots were.
November 3, 2020 - Report provides results of a study comparing 27-year effects of pre-commercial thinning vs. no thinning at age 11 in a hardwood stand. Although thinning resulted in a 1-inch gain in diameter growth, it had not made much difference in either species composition or projected rotation age of the developing stand.
November 3, 2020 - Report describes effects of crown scorch following a 1984 burn in loblolly pine. After four years, more than half the trees with 100% crown scorch had died but early differences in diameter growth had disappeared.
