نتایج جستجو برای: haloxylon plantation area

تعداد نتایج: 590161  

2001
James S. Meadows

A 21 ac, 28-yr-old water oak (Quercus nigra L.)plantation, on an old-field loessial site in north Louisiana, was subjected to three thinning treatments during the winter of 1987-1988: (I) no thinning, (2) light thinning to 180 dominant and codominant trees/at, and (3) heavy thinning to 90 dominant and codominant trees/at. Prior to thinning, the plantation averaged 356 trees/at and 86@/ac of bas...

2004
Chi-Chuan CHENG

This study applied statistical approaches to the discrimination of spatial variations between sites and between forest types in the upper area of the Liukuei Experimental Forest of Taiwan Forestry Research Institute, Taiwan. The main purpose was to compare the effectiveness of various statistical approaches and then present the best strategy for discriminating the spatial variations of species ...

Journal: :caspian journal of environmental sciences 2009
sh. mohammadnezhad kiasari

soil productivity and plant growth are usually affected by biological activities of earthworms. the objective of this study was a comparative evaluation of earthworm abundances in 20-year-old plantations of alder, oak, maple and cypress with the adjacent natural mixed broad-leaved deciduous forest in the caspian region of iran. in this research one sample plot, each 1 ha; was selected in every ...

Journal: :Remote Sensing 2016
Nathan Torbick Lindsay Ledoux William Salas Meng Zhao

Industrial forest plantations are expanding rapidly across Monsoon Asia and monitoring extent is critical for understanding environmental and socioeconomic impacts. In this study, new, multisensor imagery were evaluated and integrated to extract the strengths of each sensor for mapping plantation extent at regional scales. Two distinctly different landscapes with multiple plantation types were ...

2004
Keith Barney

The emergence of social and environmental movements against plantation forestry in Southeast Asia positions rural development against local displacement and environmental degradation. Multi-scaled NGO networks have been active in promoting the notion that rural people in Southeast Asia uniformly oppose plantation development. There are potential pitfalls in this heightened attention to resistan...

Journal: :Dong wu xue yan jiu = Zoological research 2014
Sheng-Dong Yuan Han-Lan Fei Shao-Han Zhu Liang-Wei Cui Huai-Sen Ai Peng-Fei Fan

In this study, the quadrat method was used to study the effects of tsaoko (Fructus tsaoko) plantation on tree diversity and canopy structure of two natural habitats of eastern hoolock gibbon (Hoolock leuconedys): Nankang (characterized by extensive tsaoko plantation) and Banchang (relatively well reserved and without tsaoko plantation). Totally, 102 tree species from 25 families and 16 woody li...

ژورنال: :تحقیقات مرتع و بیابان ایران 2011
علی جهانی وحید اعتماد محمد دولتی نازی اوانی

تولید نهال گیاهان بومی و غیر­بومی در نهالستان یکی از مواد اولیه برای جنگل­کاری در مناطق خشک بشمار می­رود. یکی از عوامل مؤثر و تأثیرگذار بر روی تولید نهال در نهالستان تراکم بذر و عمق کاشت می­باشد که در این ارتباط مطالعات وسیعی صورت گرفته ­است، بنابراین در این تحقیق سعی شده ­است تا تأثیر این دو عامل را بر فاکتورهای رویشی گونه زرد­تاغ بررسی نماییم. تاغ­کاریهای حسین­آباد استان قم با مساحت 3180 هکتا...

2016
Krister Andersson Duncan Lawrence Jennifer Zavaleta Manuel R Guariguata

Tree plantations play a controversial role in many nations' efforts to balance goals for economic development, ecological conservation, and social justice. This paper seeks to contribute to this debate by analyzing the socioeconomic impact of such plantations. We focus our study on Chile, a country that has experienced extraordinary growth of industrial tree plantations. Our analysis draws on a...

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