Loblolly pine seedlings were lifted from a nursery bed in two-week intervals (November 4-April 21) and were immediately planted in an open field. Each planting included seedlings planted at the root collar (A), one-half of shoot buried (B) and most of the shoot buried except for the one-inch terminal (C). Average mortality during the first year was 10%, 13% and 16% for the A, B and C planting depths, respectively; the corresponding values for the second year mortality were 2%, 3% and 5%. Average first year mortality by the planting periods ranged - 24% with the highest values for April plantings. Deep (C) planting produced most height growth during the first growing season and least during the second and third growing seasons.
Bilan, M. Victor, "Effect of time and depth of planting on survival and growth of loblolly pine (Pinus taeda L.) seedlings in Texas" (1987). Faculty Publications. 219.