نتایج جستجو برای: models forest to agriculture

تعداد نتایج: 10826590  

2017
Oleg Chertov Alexander Komarov Alexey Mikhailov Gennady Andrienko Natalia Andrienko Peter Gatalsky

Sustainable forest management requires new tools to analyze spatial and temporal forest dynamics and to examine those forest parameters that are related to sustainability. We built a prototype system for data analysis and decision-making at forest enterprise level by integrating a forest ecosystem model EFIMOD-PRO (long-term prediction of forest growth and soil development) with an interactive ...

2004
Andrew Walker

The campaign for community forestry in upland areas of northern Thailand reflects an ‘arborealised’ perspective on upland agriculture. Arborealisation – which I define as the process whereby upland livelihoods are recast as forest livelihoods – is evident in the main elements of NGO and academic advocacy for the resource rights of upland peoples. As a result of this arborealised perspective, se...

2015
RONNIE BABIGUMIRA ARILD ANGELSEN SVEN WUNDER

This paper examines the factors that influence rural household decisions to clear forestland. We use a large dataset com prising 7172 households from 24 developing countries. Twenty seven percent of sampled households had converted forest to agriculture during the previous 12 months, clearing on average 1.21 ha. Male headed households with abundance of male labor, living in recently settled pla...

2006
Marc Patry

Why a Special World Heritage Focus on Forests? Forest ecosystems hold the vast majority of the world's terrestrial species. Ironically, these same ecosystems are under the greatest chronic pressure from human activities. The most important threat comes from permanent conversion to non-forest uses – typically agriculture. The FAO (2005A) calculates that since 1990, an average of neary 12.3 milli...

Journal: :caspian journal of environmental sciences 2012
p. lohmander

in large regions of the world, biomass is a very important source of energy. the global bioenergy market based on forest biomass is growing rapidly. about 92 % of the bioenergy in sweden comes from forests. biomass from forests is not homogenous. the locations, transport distances, and transport methods, can differ very much and the industries that need biomass as input prefer raw materials wit...

Aboveground biomass (AGB) of forests is an essential component of the global carbon cycle. Mapping above-ground biomass is important for estimating CO2 emissions, and planning and monitoring of forests and ecosystem productivity. Remote sensing provides wide observations to monitor forest coverage, the Landsat 8 mission provides valuable opportunities for quantifying the distribution of above-g...

2013
Thomas Hertel Huey-Lin Lee Steven Rose Brent Sohngen

This paper develops a CGE model with unique regional land types and detailed non-CO2 GHG emissions which it uses to analyze the potential for reductions in land-based greenhouse gas emissions as well as forest sequestration. In our global, general equilibrium analysis of carbon taxation, we find that forest carbon sequestration is the dominant means for global GHG emissions reduction in the lan...

Extended abstract Introduction The present study was performed to investigate the effects of slope percentage and land use type on the produced sediment by an artificial rainfall simulator in Kakasharaf watershed, a branch of Karkhe watershed (Lorestan province).   Methodology The rainfall simulator used in this research was designed and constructed by the Soil Conservation and...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1389

the purpose of this study is to investigate the relationships between teachers’ immediacy behaviors and iranian students’ willingness to talk in english classes. analysis of the results from willingness to talk scale represents a relatively high level of willingness to talk in english classrooms among iranian language learners. the total mean score of students’ willingness to talk was 66.3 ou...

جعفرزاده, علی اکبر, مهدوی, علی, میرزایی زاده, وحید, کرمشاهی, عبدالعلی,

In order to optimize the planning and management of natural resources and the environment, it is essential to know the status of land cover changes over the past decades. Modeling land cover change can provide valuable information for better understanding of this process, determining of effective factors and forecasting of regions subject to change. This study aimed to determine and simulate th...

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