November 3, 2020 - Report provides 20-year results of a comparison of seedlings from five open-pollinated loblolly pine parents sown either separately or randomly mixed in the nursery bed. Survival was not affected by sowing pattern, but at age 20, the randomly-mixed seedlings were taller than those sown in pure lots and there were differences among genotypes.
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.
November 3, 2020 - Report provides nine-year data from a test comparing 21 different seed sources of black walnut collected within a 100-mile radius but ranging in altitude from 480 to 2,400 feet. Altitude of source did not affect frost resistance but height tended to decrease with increasing source altitude.
