John W. Duffield

8 publications by John W. Duffield:

Hybridization-Then and Now?

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1981
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New Techniques For Reading Seed Radiographs Save Time

Publication: Tree Planters' Notes - Volumes 24, Number 3 (1973)
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Inventory Procedure for Small or Specialized Forest Nurseries

Publication: Tree Planters' Notes - Issue 58 (1963)
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A Selective Systemic Herbicide for Douglas-fir Nurseries- Preliminary Findings

Publication: Tree Planters' Notes - Issue 59 (1963)
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A Simple Transplanting Board

Publication: Tree Planters' Notes - Issue 61 (1963)
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Tree Improvement Activities in the Pacific Northwest

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1959
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Summary of Forest Tree Improvement Work in the Pacific Northwest

Publication: Tree Improvement and Genetics - Northeastern Forest Tree Improvement Conference - 1957
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The Improvement in Australia and New Zealand in Relation To Work in The United States

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1953
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