What has the author Ole T Helgerson written?

Anonymous

∙ 10y ago

Updated: 8/21/2019

Ole T. Helgerson has written:

'Survival of natural and planted seedlings under a shelterwood in southwest Oregon' -- subject(s): Growth, Conifers, Trees, Seedlings

Wiki User

∙ 10y ago

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What has the author O T Helgerson written?

O. T. Helgerson has written: 'Thinning young Douglas-fir west of the Cacades for timber and wildlife' -- subject(s): Forest thinning, Thinning, Douglas fir

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Ole T. Berg was born in 1944.

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