Twenty-Year Performances of Scotch, European Black (Austrian), Red, and Jack Pines in Eastern Nebraska

摘要

Sources of Scotch, European black (Austrian), red, and jack pines were identified that produce trees, at age 20, which are well-adapted to eastern Nebraska in terms of survival, height and diameter growth, crown and stem characteristics, cone production and disease resistance. Age/age correlations indicate that provenances of superior height growth can be identified by age 10.