نتایج جستجو برای: forest by products
تعداد نتایج: 7222236 فیلتر نتایج به سال:
Research on forest recreation over the last 60 years has been voluminous. Research on nontimber forest products (NTFP) has been much less voluminous. In this chapter the history of these two tracks of research has been reviewed. Not all studies are mentioned; rather, a representative selection of the subject matter is discussed. Forest recreation research had its beginnings in the late 1950s wi...
Forest certification is a voluntary verification tool that has been gaining importance within the global sustainability issues as an independent verification tool for sustainable forest management and wood processing industry and as an influencer in private and public purchasing policies and a component of emerging wood harvesting and trade legality schemes. This study focuses on the chain-of-c...
Forest resources represent many competing uses in society. The allocation of forest resources depends primarily on the society's value for each use. The problem with allocating forest resources among its different uses lies in differences in societal values across the globe for a single use, across uses and even within political boundaries. These differences in values held by societies across t...
When we speak of forest products we include not only the timber from the trees, but also such other products as derive from the bark, the leaves, or the roots. In this address, however, I shall be dealing almost exclusively with timber and its derived products. By a long-standing gentlemen’s agreement the other products, as well as certain aspects of pulping, are dealt with by the Colonial Prod...
conservation of biodiversity in protected areas will be more challenging if local communities are heavily dependent on them for various products and subsistence needs. this study estimated forest dependency and identified factors influencing dependency for households living around kasane forest reserve (kfr). data collected from 237 households were analyzed using logistic regression model. logi...
Unmanned aerial vehicles (UAVs) and digital photogrammetric techniques are two recent advances in remote sensing (RS) technology that are emerging as alternatives to high-cost airborne laser scanning (ALS) data sources. Despite the potential of UAVs in forestry applications, very few studies have included detailed analyses of UAV photogrammetric products at larger scales or over a range of fore...
The increasing demand for an increasing array of special forest products is forcing forest landowners and managers to address special products within ongoing management and silvicultural activities. Strategies can vary from single species management in agricultural or near agricultural operations to complex forest management strategies which move special products across an ownership or landscap...
This study presents an empirical analysis of the relationship between industrial timberland ownership and financial performance of forest products companies in the United States. Based on the structure-conduct-performance model of the industrial organization theory, we develop and estimate a three-stage least squares model system that links timberland ownership with performance. Our results sho...
An automated method was developed for mapping forest cover change using satellite remote sensing data sets. This multi-temporal classification method consists of a training data automation (TDA) procedure and uses the advanced support vector machines (SVM) algorithm. The TDA procedure automatically generates training data using input satellite images and existing land cover products. The derive...
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