نتایج جستجو برای: forest products

تعداد نتایج: 393367  

2015
Lawrence Damnyag Tapani Tyynelä Mark Appiah Olli Saastamoinen Ari Pappinen

a r t i c l e i n f o The ecological, economic and socio-cultural roles of forests are under threat in Ghana due to the high rate of deforestation. Efforts are being made to combat this problem through rehabilitation measures. However, the costs of deforestation and restoration benefits are not adequately estimated. This paper fills in the gap in knowledge by providing an empirical estimation o...

2017
John F. Munsell Adrian Ares Scott M. Barrett Brian H. Bond Jennifer L. Gagnon

Participation among private forest owners, logging contractors, and wood products manufacturers in the forest certification sector remains low. Those that enroll are mainly large-acreage owners and specialized manufacturers. Little is known about certification perspectives across the supply chain and how they relate. Comparing what owners, contractors, and manufacturers think about certificatio...

Journal: :Remote Sensing 2016
Myroslava Lesiv Elena Moltchanova Dmitry Schepaschenko Linda M. See Anatoly Shvidenko Alexis J. Comber Steffen Fritz

Data fusion represents a powerful way of integrating individual sources of information to produce a better output than could be achieved by any of the individual sources on their own. This paper focuses on the data fusion of different land cover products derived from remote sensing. In the past, many different methods have been applied, without regard to their relative merit. In this study, we ...

Journal: :Croatian Journal of Forest Engineering 2021

Forest roads are the key infrastructures that provide access to forest areas for sustainable management, protection, and utilization of resources. In order benefit from important functions roads, they should be built in with adequate technical road standards. The network low standards require more frequent major repairs ensure continues addition, only small trucks load capacity can move on stan...

Journal: :جنگل و فرآورده های چوب 0
شکوه سلطانپور دانشجوی کارشناسی ارشد مهندسی جنگل، دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران مقداد جورغلامی دانشیار گروه جنگلداری و اقتصاد جنگل، دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران

forest harvesting operations for extracting of forest products in these trails, causing extensive damage in a wide range of soil and its productivity every year, therefore it is necessary to research about degradation of soil properties should be down. the aim of this study was investigate changes in the skid trails soil physical characteristics due to wheeled cable skidder traffic by measuring...

2015
Titta Majasalmi Pauline Stenberg Sari Palmroth

The aim of this dissertation is to assess the accuracy of different ground reference methods used to validate satellite based leaf area index (LAI) and the fraction of absorbed photosynthetically active radiation (fPAR) products. LAI and fPAR are strongly linked, although they principally and practically measure different properties: LAI quantifies the areal interphase between soil and atmosphe...

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