نتایج جستجو برای: shelterwood felling

تعداد نتایج: 783  

ژورنال: علوم آب و خاک 2009
اسلام بنیاد, امیر, توانکار, فرزام, مجنونیان, باریس,

Forest future depends on forest stands regeneration. Soil is one of the principal capitals in the forest area. It is important to minimize damages to the forest ecosystem during logging operation. In forestry and forest management, it is significant to know the effect of forest logging damages on regeneration, sapling and soil compaction. This study was carried out in Asalem Beech forest area, ...

2001
T. L. Wurtz J. C. Zasada

We present 27-year results from a comparison of clear-cutting and shelterwood harvesting in the boreal forest of Alaska. Three patch clear-cut and three shelterwood units were harvested in 1972; about 100 dispersed white spruce (Picea glauca (Moench) Voss) leave trees per hectare were retained in the shelterwoods. Units were mechanically scarified and an exceptionally large seed-crop was disper...

2012

Pre-commercial thinning is a thinning method performed prior to trees reaching merchantable size, typically around 4.5 inches dbh (diameter at breast height measured at 4.5 ft. above the ground). The objective of a pre-commercial thinning is to release some trees in overstocked stands by reducing densities to prevent stagnation and increase the growth of the remaining trees. Many southern pine ...

Journal: :Turkish Journal of Forestry | Türkiye Ormancılık Dergisi 2017

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