Pruning of ponderosa pine
Subtitle: effect on growth
By: James W. Barrett.
Series: USDA Forest Service research paper PNW -- 68.
Publisher: Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture
Published: 1968
Place of publication: Portland, Or
Language: eng
Subjects: Ponderosa pine -- Pruning.; Ponderosa pine -- Growth.
Notes: Cover title.

Bibliography: p. 9.