H. Gerhold

发表

Genetic Structure and Mating System of Northern Red Oak (Quercus rubra L.) in Pennsylvania

John F. Schwarzmann, H. Gerhold, 1991 .

Past, Present, and Anticipated Applications of Clonal Forestry

J. Kleinschmit, H. Gerhold, W. Libby, 1993 .

CARBON STORAGE BY URBAN TREE CULTIVARS, IN ROOTS AND ABOVE GROUND

H. Gerhold, Andra D. Johnson, 2003 .

Tree Shelters TREE SHELTERS ACCELERATE SLOW-GROWING SPECIES IN NURSERIES by

H. Gerhold, R. Witmer, Eric R. Ulrich, 2006 .

Tree Shelters Accelerate Slow-Growing Species in Nurseries

H. Gerhold, R. Witmer, Eric R. Ulrich, 1997, Arboriculture & Urban Forestry.

Origins of Urban Forestry

H. Gerhold, 2007 .

MANAGEMENT INFORMATION SYSTEMS FOR URBAN TREES1

K. Steiner, H. Gerhold, 1987 .

Electrophoretic analysis of genetic linkage in Scots pine (Pinus sylvestris L.)

K. Johnson, H. Gerhold, C. Niebling, 1987, Biochemical Genetics.

Genetic Evaluation of Rapid Forest Service Height Growth in Pot-and NortheasternForest Nurser ~-GrOWn Scotch Pine Experiment

H. Gerhold, M. E. Demeritt, 2006 .

Population hybridization in scotch pine (Pinus sylvestris L.): I: Genetic variance components and heterosis

H. Gerhold, Y. Park, Y. Park, 1986 .

Root dimensions of landscape tree cultivars

H. Gerhold, Andra D. Johnson, 2003 .

Evaluating Host Resistance to the White-Pine Weevil, Pissodes strobi, (Coleoptera: Curculionidae) Using Feeding Preference Tests

H. Gerhold, G. Plank, 1965 .

Eastern White Pine characteristics related to weevil feeding.

R. C. Stroh, H. Gerhold, 1965 .

Resistance of Western White Pine to White-Pine weevil.

H. Gerhold, R. Soles, E. H. Palpant, 1970 .

IN QUEST OF INSECT-RESISTANT FOREST TREES

H. Gerhold, 1966 .

Callery Pear Cultivars Tested as Street Trees: Initial Results

H. Gerhold, Heather L. McElroy, 1994, Arboriculture & Urban Forestry.

Callery Pear Cultivars Tested As Street Trees: Final Report on a 12-year Study

Henry D. Gerhold, H. Gerhold, 2007, Arboriculture & Urban Forestry.

Replacement of Trees Under Utility Wires Impacts Attitudes and Community Tree Programs

H. Gerhold, D. E. Flowers, 2000, Arboriculture & Urban Forestry.

Serviceberry Cultivars Tested as Street Trees: Initial Results

Henry D. Gerhold, H. Gerhold, 1999, Arboriculture & Urban Forestry.

Tree Lilac Cultivars Tested as Street Trees: Initial Results

Henry D. Gerhold, H. Gerhold, 1999, Arboriculture & Urban Forestry.

Street Tree Performance Tests of Crabapple Cultivars: Initial Results

H. Gerhold, Heather L. Rhodes, Heather L. McElroy, 1994, Arboriculture & Urban Forestry.

Crabapple Cultivars Tested as Street Trees: Second Report

H. Gerhold, 2000, Arboriculture & Urban Forestry.

Callery Pear Cultivars Tested as Street Trees: Second Report

H. Gerhold, 2000, Arboriculture & Urban Forestry.

Municipal Tree Programs in Pennsylvania

Henry D. Gerhold, Eric C. Reeder, H. Gerhold, 1993, Arboriculture & Urban Forestry.

Crabapple Cultivars Tested As Street Trees: Third Report

H. Gerhold, 2007 .

Serviceberry Cultivars Tested as Street Trees: Second Report

H. Gerhold, 2008, Arboriculture & Urban Forestry.

Performance Testing of Street Tree Cultivars: A Model Project

H. Gerhold, 1985, Arboriculture & Urban Forestry.

Performance Testing Tree Cultivars in Metropolitan Environments

H. Gerhold, W. D. Bartoe, 1976, Arboriculture & Urban Forestry.

Selecting Trees for Community Landscapes

Henry D. Gerhold, William Porter, H. Gerhold, 2007 .

Motivations and Task Preferences of Urban Forestry Volunteers

H. Gerhold, Douglas T. Still, 1997, Arboriculture & Urban Forestry.

Monoterpene variations in vapors from white pines and hybrids.

H. Gerhold, G. Plank, 1970 .

Breeding pest-resistant trees.

E. J. Schreiner, H. Gerhold, R. Mcdermott, 1966 .

Genetic information needed for metropolitan trees

A. Long, H. Gerhold, M. E. Demeritt, 1975 .