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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Issue 64 (1964) → Artificial Lighting Fails to Stimulate Height Growth of White Pine Seedlings in Nursery Studies

Artificial Lighting Fails to Stimulate Height Growth of White Pine Seedlings in Nursery Studies

During the 1957-60 period the Tennessee Valley Authority studied several methods of stimulating growth of white pine to reduce the time required to produce plantable seedlings. The methods included various artificial lighting treatments, fertilization, and different seeding times. At the nursery where the study was conducted, white pine is the only species requiring 2 years to attain plantable size. In 1961 the cost of raising white pine seedlings was $5 per thousand the first year and an additional $4 the second. Seedlings with secondary needles, well-developed terminal buds, and heights of at least 3 inches were classified as plantable. These criteria were consistent with general observations on minimum requirements for handling and outplanting white pine seedlings, although results of more recent tests indicate that 1-year-old white pine may be outplanted successfully.


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Author(s): Douglas Bean

Publication: Tree Planters' Notes - Issue 64 (1964)