نتایج جستجو برای: aged forest

تعداد نتایج: 301189  

Journal: :Forest Ecology and Management 2021

Forest management, especially thinning and harvesting measures, has a significant impact on the forest carbon balance in forests with long-term continuous cover history. We measured soil CO2 efflux (Rs) three complexes of mixed, uneven-aged Dinaric predominating silver fir (Abies alba Mill.), beech (Fagus sylvatica L.), Norway spruce (Picea abies Karst.). Rs was after removal mature stands 50% ...

Journal: :پژوهش های علوم و فناوری چوب و جنگل 0

in the past, forest road network designing was mainly done for its main goals-management and exploitation. this study was performed to pay attention for multilateral goals of forest roads, especially its role in forest villages’ development, in estakhr-posht of neka (6 villages) in series 2, section 6 of neka-zalem rood forest management plan. at first, constructed forest roads and suggested ro...

Journal: :AJS; American journal of sociology 1974
V L Bullough

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پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم بهزیستی و توانبخشی 1387

چکیده ندارد.

Journal: :Economic development and cultural change 2012
James P Smith Yan Shen John Strauss Yang Zhe Yaohui Zhao

In this paper, we model the associations of childhood health on adult health and socio-economic status outcomes in China using a new sample of middle aged and older Chinese respondents. Modeled after the American Health and Retirement Survey (HRS), the CHARLS Pilot survey respondents are 45 years and older in two quite distinct provinces-Zhejiang, a high growth industrialized province on the Ea...

2017
Philippe Nolet Martin Béland

While uneven-aged silviculture may appear preferable to even-aged silviculture in terms of stand susceptibility to windthrow (major wind damage), the scientific evidence is equivocal on this issue, because the two systems do not operate over the same time frame. The goal of this study was to evaluate the windthrow susceptibility of evenand uneven-aged stands over a 100-year period. Susceptibili...

Journal: :Demography 2009
James P Smith

This article provides evidence about the quality of retrospective childhood health histories given to respondents in the Health and Retirement Survey (HRS) and the Panel Study of Income Dynamics (PSID). Even though information on early life health events is critical, there is legitimate skepticism about the ability of older respondents to remember specific health problems that they had during c...

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