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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Volume 40, Number 3 (1989) → Growth Differences Among Patented Grafts- Seed Orchard Seedlings- and Nursery-Run Seedlings of Black Walnut

Growth Differences Among Patented Grafts- Seed Orchard Seedlings- and Nursery-Run Seedlings of Black Walnut

A major consideration in short-rotation management of black walnut (Juglans nigra L.) is the planting of genetically improved stock. Two sources of improved planting stock were compared with nursery-run (i.e., average seedlings obtained from the nursery) seedlings to evaluate differences in diameter, height, and stem form quality. Purdue #1 patented grafts, seedlings developed from direct-seeded nuts (TVA seed orchard), and nursery-run seedlings were compared after 4 years of intensive management. No significant differences were found between patented grafts and the seed orchard material, but both outperformed nursery-run material by 20 to 30% growth increases.


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Author(s): William E. Hammitt

Publication: Tree Planters' Notes - Volume 40, Number 3 (1989)

Volume: 40

Number: 3