za Słownikiem Ochrony Środowiska Czekierdy:
drzewostan nasienny - seed stand, seedling crop
wykorzystanie gospodarcze lasu - economic use of forest

jest też coś takiego jak "economic felling" czyli wyrąb gospodarczy:
... problem of clearing timber and undergrowth is divided into two parts – economic(felling of marketable commercial timber) and ecological (assurance of water ...
www.kluweronline.com/article.asp?PIPS=371911&PDF=1

a "economic seed stand(s)" pojawiają się na stronach polskich:
... in economic seed stands and selected seed stands, as well as in seedling seed orchards and through the designation of plus trees. ... Economic seed stands ...
www.lp.gov.pl/media/biblioteka/ in_english/state_forests_in_figures2004.pdf

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Note added at 1 hr 41 mins (2004-12-18 17:59:08 GMT)
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mam dzisiaj pecha do linków... Ten powinien działać:
http://www.lp.gov.pl/media/biblioteka/in_english/state_fores...