نتایج جستجو برای: mixed and natural stands
تعداد نتایج: 16917246 فیلتر نتایج به سال:
Nitrogen (N)-fixing species have a function to enrich N in soil. Mixing N-fixing shrub species into poplar stands can be assumed as a measure to increase productivity while improving soil fertility. To verify this assumption and to understand the temporal influences of N-fixing shrub species mixed into poplar plantations on soil fertility, we investigated selected soil chemical and microbial pr...
Forest plantations, particularly high-density planted stands, are considered to be more prone wind damage compared naturally regenerated stands. The resistance (mechanical stability) of plantations can, however, improved by close-to-natural management, for example, combining pioneer and shade-tolerant species. Presumably, the stability such stands would enhanced reduced competition canopy trees...
Stand development involves changes in stand structure over time. Knowledge of stand development patterns is crucial for effective forest management, especially of southern bottomland hardwood forests. These forests contain more than 70 tree species, many of which have commercial timber and wildlife habitat value. I n this paper, current techniques i n stand development research are reviewed. Em...
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The effects after 25 years of moose browsing on Scots pine stands in Lahemaa National Park were evaluated, emphasizing economic damage. A re-evaluation in 2001 examined stands that had been evaluated in 1975–1976. Moose damage significantly affected the tree species composition which changed over time as pine dominance increased and the number of mixed stands declined. The smaller proportion of...
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