Clifford E. Ahlgren
4 publications by Clifford E. Ahlgren:
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Survival and White Pine Blister Rust Infection in a Minnesota White Pine Screening Study
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Publication: Tree Improvement and Genetics - Northeastern Forest Tree Improvement Conference - 1987
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Tree Improvement Work in Progress at the Quetico-Superior Wilderness Research Center
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Publication: Tree Improvement and Genetics - Lake States Forest Tree Improvement Conference - 1955
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Tree Improvement Work in Progress at the Quetico-Superior Wilderness Research Center
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Publication: Tree Improvement and Genetics - Lake States Forest Tree Improvement Conference - 1957
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Inter- and Intra-specific Grafting and Breeding of Five-Needle Pines
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Publication: Tree Improvement and Genetics - Lake States Forest Tree Improvement Conference - 1969
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