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- W1505663368 abstract "Natural seedfall under Douglas-fit (P!e tlot! gli menz;eii (M|tb.) Franco) shelterwood stands provides both benefits and costs to thc land manager, partly depending on resultant scan<l density. Under lean seedfall conditjoos, on the average, natural seedfall has the potential to rcstcrck 480 seedlings per acre *'ithio I years. lntroduction Natural seedfall under coastal Douglas-fir (Prcad.otswga menziesii (Mirb.) Fratco) shelterwood staods provides both beoefits and costs that should be considered by land managers plaooing for regeneratioo aod early maoagemeot of such stands. The major benefit is assurance of at least adequatel regeneration when site prepararioo is adequate (I(illiamson 1973). Also, natural seedlings should be better adapted than planred seedlings to adverse conditioos (e.g., root pathogens and frost) peculiar to the site. Some beoefits may be realized through geoetic improvement if seed is provided by the most vigorous and dominant trees from the ioitial stand. If planting of seedlings after the seed cur in shelterwood operations is planned, then the only direct cost associated with seedfall and resulting natural regeoeration would be for precommercial thinning if seedling density is too great. Planting is commonly practiced under shelterwood staods to shorten the tegenemriorr period. If survival of planted trees is good arid natural seedliogs are abuodartr, precommercial thinniog may be necessary. ITith oarural regenemtion, on the other haod, insufficient density may resulr in a cosr for fill-in planting." @default.
- W1505663368 created "2016-06-24" @default.
- W1505663368 creator A5053019776 @default.
- W1505663368 date "1983-01-01" @default.
- W1505663368 modified "2023-09-24" @default.
- W1505663368 title "Seedfall under Coastal Douglas-fir Shelterwood Stands" @default.
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