نتایج جستجو برای: stands

تعداد نتایج: 21645  

Journal: :Journal of Forest Science 2008

2009
Jinpeng Wei

model of such TOCTTOU problems (called CUU –“C” stands for “Check” and “U” stands for “Use”) that captures all potential vulnerabilities. The model is based on

Journal: :PS: Political Science & Politics 1986

Journal: :Practical Neurology 2016

Journal: :مرتع و آبخیزداری 0
حجت ا... خ دری غریب وند قاسمعلی دیانتی تیلکی منصور مصداقی منوچهر سرداری

the aim of this research was to determine the effects of camphorosma monspeliaca species on soil nutrient elements in its habitat. for rangeland, ecological positive or negative effects of plant species on environment must carefully be examined before allowing their plantation in vast areas; on the other hand this species with their special characteristics have special effects on their surround...

2010
S. M. Bisbing P. B. Alaback T. H. DeLuca

There is limited understanding of the carbon (C) storage capacity and overall ecological structure of oldgrowth forests of western Montana, leaving little ability to evaluate the role of old-growth forests in regional C cycles and ecosystem level C storage capacity. To investigate the difference in C storage between equivalent stands of contrasting age classes and management histories, we surve...

Journal: :جنگل و فرآورده های چوب 0
وحید اعتماد استادیار گروه جنگلداری و اقتصاد جنگل، دانشکده منابع طبیعی، دانشگاه تهران مرتضی مریدی دانشجوی کارشناسی ارشددانشگاه تهران کیومرث سفیدی استادیار دانشکده فناوری کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی

evaluating the forest stands structure in different development stages is one of the ways for better understanding the forest dynamics and its response to natural disturbances. this study was carried out in the compartment 319, kheiroud forest in order to quantify the structure properties of mixed beech stands in the stem exclusion phase. for this purpose, three one-hectare sample plots were se...

Journal: :Frontiers in Public Health 2014

2005
CHRISTOPHER M. GOUGH JOHN R. SEILER P. ERIC WISE MAN CHRISTOPHER A. MAIER

We measured sol1 surface C02 cfflux (F,) 111 loblolly ptnc stands ( P m u ~ t~red~i L ) located on the Vtrglnia Plcdmont (VA) and South Carollna Coastal Platn (SC) In cfforts to assess the lnlpact cl~matc, productlv~ty, and cultural practlccs have on F, in the managed loblolly plnc ecosystem The cffect of qtand dge on F, was cxamlncd using a rcplicaled chronoscqucncc approach In whlch stands ra...

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