نتایج جستجو برای: forestry management

تعداد نتایج: 859308  

2016
Hjalmar Laudon Lenka Kuglerová Ryan A. Sponseller Martyn Futter Annika Nordin Kevin Bishop Tomas Lundmark Gustaf Egnell Anneli M. Ågren

Protecting water quality in forested regions is increasingly important as pressures from land-use, long-range transport of air pollutants, and climate change intensify. Maintaining forest industry without jeopardizing sustainability of surface water quality therefore requires new tools and approaches. Here, we show how forest management can be optimized by incorporating landscape sensitivity an...

Journal: :Journal of environmental quality 2006
Richard A Birdsey

The United States Climate Change Initiative includes improvements to the U.S. Department of Energy's Voluntary Greenhouse Gas Reporting Program. The program includes specific accounting rules and guidelines for reporting and registering forestry activities that reduce atmospheric CO2 by increasing carbon sequestration or reducing emissions. In the forestry sector, there is potential for the eco...

2004
Camille Antinori David Barton Bray

Few examples exist in the common property literature of community-managed forestry enterprises (CFEs) operating in competitive markets. Yet, in Mexico there are hundreds of such examples operating at varying levels of productive and processing capability. At a time when the devolution of rights to forest resources is expanding worldwide, collective management of timber operations presents a new...

Journal: :INFOR 2008
Sophie D'Amours Mikael Rönnqvist Andres Weintraub

Over the years, Operational Research (OR) has been used extensively to support the forest products industry and public forestry organizations (e.g., governments, environmental protection groups) in their respective planning activities concerning the flow of wood fiber from the forest to the customer. The applications deal with a wide range of problems, ranging from long-term strategic problems ...

2003
Oliver Springate-Baginski

This paper describes an approach to developing and using process indicators of the institutional development of Forest User Groups (FUGs) in Nepal. Assessments of FUGs were carried out with forest users, on the basis of indicators identified by the users themselves. The approach is helpful in distinguishing patterns of development in the institutional diversity of FUGs, and highlighting support...

1999
Jonathan Davies Michael Richards Philippa Haden

Executive Summary v Glossary of Economic Terms ix 1. Introduction 1 1.1 Background and hypotheses 1 1.2 Objectives and target audience 1 1.3 Definitions and scope 1 1.4 Structure of paper 4 2. Economics and Forestry: a Conceptual Overview 4 2.1 Introduction 4 2.2 Forestry, economics and public resource allocation 4 2.3 Recent changes in economic and forest policies 5 2.4 The development of envi...

2003
S. E. Taylor

The term “Precision Forestry” is being used more frequently in the forest products industry. This paper defines two broad categories of precision forestry as 1) using geospatial information in forest management and planning, and 2) site-specific silvicultural operations. One case study is presented for site-specific application of herbicides and fertilizers in herbaceous weed control activities...

2008
C. Y. Lo L. C. Chen

To understand the biomass condition in the forestry areas, the detection for individual trees becomes an important topic. For forestry management, the canopy may be described with several parameters, e.g., number of stems, stand position, tree height, timber volume, canopy cover, etc. Traditional methods rely on field measurements, imagery, and radar data to derive the canopy information. Follo...

2011
K. A. Dahlberg

1. Development of the Concept of Regenerative Food Systems 1.1. The Search for Alternatives to Unsustainable Industrial Agriculture 1.2. From Regenerative Agriculture to Regenerative Food Systems. 1.3. Regenerative Approaches and Analysis 2. The Socionatural Framework 2.1. Different Processes Observable with Different Time-Frames and Scales 2.1.1. Inconsistencies, Gaps, and Uncertainties in Nat...

2008
Wayne C. Zipperer

During the 1990s, the United States Department of Agriculture Forest Service shifted from commodity production management to ecosystem-based management (Overbay, 1992). Although definitions of ecosystem-based mana-gement vary by objectives, the principle had four primary elements: (1) maintaining viable populations of native species, (2) representing native ecosystems across their range of natu...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید

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  • "; pgn_html+=pgn_li; } document.getElementById("pgn-ul").innerHTML=pgn_html var pgn_links = document.querySelectorAll('.mypgn'); pgn_links.forEach(function(pgn_link) { pgn_link.addEventListener('click', paginate) }) } function post_and_fetch(data,url) { showLoading() xhr = new XMLHttpRequest(); xhr.open('POST', url, true); xhr.setRequestHeader('Content-Type', 'application/json; charset=UTF-8'); xhr.onreadystatechange = function() { if (xhr.readyState === 4 && xhr.status === 200) { var resp = xhr.responseText; resp_json=JSON.parse(resp) resp_place = document.getElementById("search_result_div") resp_place.innerHTML = resp_json['results'] search_meta = resp_json['meta'] update_search_meta(search_meta) update_pagination() hideLoading() } }; xhr.send(JSON.stringify(data)); } function unfilter() { url=/search_year_filter/ var term=document.getElementById("search_meta_data").dataset.term var data={ "year":"unfilter", "term":term, "pgn":1 } filtered_res=post_and_fetch(data,url) } function deactivate_all_bars(){ var yrchart = document.querySelectorAll('.ct-bar'); yrchart.forEach(function(bar) { bar.dataset.active = false bar.style = "stroke:#71a3c5;" }) } year_chart.on("created", function() { var yrchart = document.querySelectorAll('.ct-bar'); yrchart.forEach(function(check) { check.addEventListener('click', checkIndex); }) }); function checkIndex(event) { var yrchart = document.querySelectorAll('.ct-bar'); var year_bar = event.target if (year_bar.dataset.active == "true") { unfilter_res = unfilter() year_bar.dataset.active = false year_bar.style = "stroke:#1d2b3699;" } else { deactivate_all_bars() year_bar.dataset.active = true year_bar.style = "stroke:#e56f6f;" filter_year = chart_data['labels'][Array.from(yrchart).indexOf(year_bar)] url=/search_year_filter/ var term=document.getElementById("search_meta_data").dataset.term var data={ "year":filter_year, "term":term, "pgn":1 } filtered_res=post_and_fetch(data,url) } } function showLoading() { document.getElementById("loading").style.display = "block"; setTimeout(hideLoading, 10000); // 10 seconds } function hideLoading() { document.getElementById("loading").style.display = "none"; } -->