نتایج جستجو برای: silviculture
تعداد نتایج: 667 فیلتر نتایج به سال:
Timber supplies from public native forests have declined significantly in recent decades. Consequently, wood processors are increasingly dependent on private land to maintain their throughput of native species logs. In some regions of Australia, more than 50 per cent of native forest industry log supply comes from private property. There is concern that this increased demand brings with it the ...
In the southern United States, the turn of the 20th century saw the high-grading of virgin pine stands that left millions of acres of forestland in desperate condition. Some of these southern pine stands now support thriving forests whose patterns and processes resemble those extant before they were cut a century ago, but others do not. The success of this recovery in the southern pinery was ba...
Knowledge of the frequency and occurrence macroinvertebrates throughout landscapes may clarify effects anthropic impacts on aquatic systems help guide conservation actions for watersheds. We evaluated macroinvertebrate α β diversity in streams four different subtropical phytophysiognomies: highland grasslands with arboreal riparian vegetation, without mixed ombrophilous forest silviculture. als...
A Critical Review on Nitrogen Management in Speciality Corn under Pongamia + Maize Agri-silvi System
Intercropping of agricultural crops with woody species is an age-old practice in traditional farming systems in the tropics. Food production is the major aim of subsistence farmers with most of their farmland being allocated to food crops rather than to trees and shrubs. Due to increasing population and scarcity of productive lands that cannot sustain intensive exploitation, one method that has...
Endangered forest-grassland mosaics interspersed with expanding agriculture and silviculture occur across many parts of the world, including the southern Brazilian highlands. This natural mosaic ecosystem is thought to reflect alternative stable states driven by threshold responses of recruitment to fire and moisture regimes. The role of adaptive human behavior in such systems remains understud...
Abstract The northern hardwood research program at the Dukes Experimental Forest in Michigan and Argonne Experimental Forest in Wisconsin has been adapting to changing management and social objectives for more than 80 years. In 1926, the first northern hardwood silviculture study was established in old-growth stands at the Dukes Experimental Forest. In response to social demands for more “natur...
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