The Experts below are selected from a list of 261 Experts worldwide ranked by ideXlab platform
Steve Harrison - One of the best experts on this subject based on the ideXlab platform.
-
Users’ Reactions to the Primer on Tree Registration Policies: Lessons for Designing Extension Materials and Improving Information Flow
Small-scale Forestry, 2009Co-Authors: Rotacio Gravoso, Eduardo Mangaoang, Maria Anabelle Gerona, Arturo Pasa, Steve HarrisonAbstract:In the Philippines, only a few farmers and plantation owners register their Tree Farms with the Department of Environment and Natural Resources (DENR), the office in charge of Tree registration. One of the major reasons is their lack of knowledge of government policy on Tree registration. To help improve the flow of information and understanding of Tree registration policies among smallholder Tree farmers and other stakeholders, a Primer on Tree Registration, Harvesting, Transport and Marketing Policies on Private Land was developed. Produced through the participation of stakeholders, including Tree farmers, the DENR, and local government officers, police, and timber dealers, the Primer is highly visual and has been released in English as well as Waray–Waray and Cebuano dialects. This paper reports findings of focus group discussions conducted to gauge user reactions to the Primer. The Primer was considered as a valuable source of information about Tree registration policies. Aside from being comprehensible, FGD participants found it attractive, perceived it to be intended for them and free from content that confused them. However, farmers suggested that illustrations need to be improved by making the persons portrayed more presentable and reflective of their actual Tree farm operations. Participants said that aside from the Primer, the flow of information on Tree registration policies could be improved through the use of multi-media including posters, radio broadcasts, and presentation in seminars for farmers.
-
Users’ Reactions to the Primer on Tree Registration Policies: Lessons for Designing Extension Materials and Improving Information Flow
Small-scale Forestry, 2009Co-Authors: Rotacio Gravoso, Eduardo Mangaoang, Maria Anabelle Gerona, Arturo Pasa, Steve HarrisonAbstract:In the Philippines, only a few farmers and plantation owners register their Tree Farms with the Department of Environment and Natural Resources (DENR), the office in charge of Tree registration. One of the major reasons is their lack of knowledge of government policy on Tree registration. To help improve the flow of information and understanding of Tree registration policies among smallholder Tree farmers and other stakeholders, a Primer on Tree Registration, Harvesting, Transport and Marketing Policies on Private Land was developed. Produced through the participation of stakeholders, including Tree farmers, the DENR, and local government officers, police, and timber dealers, the Primer is highly visual and has been released in English as well as Waray–Waray and Cebuano dialects. This paper reports findings of focus group discussions conducted to gauge user reactions to the Primer. The Primer was considered as a valuable source of information about Tree registration policies. Aside from being comprehensible, FGD participants found it attractive, perceived it to be intended for them and free from content that confused them. However, farmers suggested that illustrations need to be improved by making the persons portrayed more presentable and reflective of their actual Tree farm operations. Participants said that aside from the Primer, the flow of information on Tree registration policies could be improved through the use of multi-media including posters, radio broadcasts, and presentation in seminars for farmers.
-
Recovery of milling timber from smallholder Tree Farms using chainsaw and mini-bandsaw
2009Co-Authors: Edwin Cedamon, John L. Herbohn, Steve HarrisonAbstract:The sawing recovery rates of chainsaws and mini-bandsaws used on Leyte Island, the Philippines to produce sawn timber from smallholder Tree Farms are compared through sawing trials. The sawing recovery rate for a mini-bandsaw is 52% while that for chainsaws is 39%. The sawing trials found that log sizes and the cross-section areas of boards showed a weak linear relationship to the sawing recovery rate for sample logs sawn. Significant differences in sawing recovery rates between the saw operators involved in the sawing trials were also detected. This paper mainly reports the results for comparing the sawmilling recovery for chainsaws and mini-bandsaws, while the financial as well as policy implications of the differences in sawing recovery rate between these two saw types are discussed in a separate paper in these Proceedings.
-
MEASUREMENT OF SMALLHOLDER Tree Farms ON LEYTE ISLAND
2009Co-Authors: G. Monterola, John L. Herbohn, Florante F. Morales, Jerome K. Vanclay, Grant Wardell-johnson, Eduardo O. Mangaoang, Steve HarrisonAbstract:This paper describes the field techniques used to measure timber volume and log quality from smallholder Tree Farms on Leyte Island conducted as part of ACIAR project ASEM/2003/052, Improving Financial Returns from Smallholder Tree Farms in the Philippines . Tree Farms were included in the sample if they were 0.1 ha or greater in area and contained 100 or more Trees. Paired circular blocks were chosen for measurement, one in the centre and one on the edge of the Tree block. Where Tree Farms included multiple blocks of Trees, two circular plots were established within each block. For each Tree over 10 cm diameter at breast height (dbh) in the plot, measurements were made of dbh, diameter at the base (db), Tree height, location, crown depth, crown radius, bearing and distance of each Tree with reference to the plot centre. Estimates of log lengths and grade that each Tree was expected to yield were also recorded, along with a sketch of each Tree. In addition, data were collected on Tree farm, block and plot characteristics, and were entered into an ACCESS database for subsequent analysis.
-
Improving the triple bottom line returns from smallholder Tree Farms in the Philippines: A systems approach
2009Co-Authors: John L. Herbohn, Steve Harrison, Jerome K. Vanclay, Eduardo O. Mangaoang, Edwin Cedamon, Nestor Gregorio, Iean W. Russell, Grant Wardell-johnsonAbstract:This paper outlines the application of systems thinking in investigating ways to improve the returns to smallholder Tree farmers in the Philippines. The paper illustrates how a systems approach was used in the conceptualisation of the project and how systems thinking facilitated a shared understanding of the how each individual’s research contributed to the broader project activities. Systems thinking has also been used in the design and implementation of various project activities. Three examples are provided. The first example illustrates how a systems diagram was developed which outlined the direct and indirect linkages between biophysical data on Tree Farms and various activities designed to increase returns. The second example illustrates how the suggested approach for improving the flow of information concerning Tree registration, harvest and transportation regulations and approval mechanisms link with various project activities and have been informed by a series of action research workshops. The third example illustrates how systems thinking has been applied to understand the factors affecting the production of high quality Tree seedlings and to investigate the effect of policy interventions on improving the quality of seedlings available to smallholders.
John L. Herbohn - One of the best experts on this subject based on the ideXlab platform.
-
Recovery of milling timber from smallholder Tree Farms using chainsaw and mini-bandsaw
2009Co-Authors: Edwin Cedamon, John L. Herbohn, Steve HarrisonAbstract:The sawing recovery rates of chainsaws and mini-bandsaws used on Leyte Island, the Philippines to produce sawn timber from smallholder Tree Farms are compared through sawing trials. The sawing recovery rate for a mini-bandsaw is 52% while that for chainsaws is 39%. The sawing trials found that log sizes and the cross-section areas of boards showed a weak linear relationship to the sawing recovery rate for sample logs sawn. Significant differences in sawing recovery rates between the saw operators involved in the sawing trials were also detected. This paper mainly reports the results for comparing the sawmilling recovery for chainsaws and mini-bandsaws, while the financial as well as policy implications of the differences in sawing recovery rate between these two saw types are discussed in a separate paper in these Proceedings.
-
MEASUREMENT OF SMALLHOLDER Tree Farms ON LEYTE ISLAND
2009Co-Authors: G. Monterola, John L. Herbohn, Florante F. Morales, Jerome K. Vanclay, Grant Wardell-johnson, Eduardo O. Mangaoang, Steve HarrisonAbstract:This paper describes the field techniques used to measure timber volume and log quality from smallholder Tree Farms on Leyte Island conducted as part of ACIAR project ASEM/2003/052, Improving Financial Returns from Smallholder Tree Farms in the Philippines . Tree Farms were included in the sample if they were 0.1 ha or greater in area and contained 100 or more Trees. Paired circular blocks were chosen for measurement, one in the centre and one on the edge of the Tree block. Where Tree Farms included multiple blocks of Trees, two circular plots were established within each block. For each Tree over 10 cm diameter at breast height (dbh) in the plot, measurements were made of dbh, diameter at the base (db), Tree height, location, crown depth, crown radius, bearing and distance of each Tree with reference to the plot centre. Estimates of log lengths and grade that each Tree was expected to yield were also recorded, along with a sketch of each Tree. In addition, data were collected on Tree farm, block and plot characteristics, and were entered into an ACCESS database for subsequent analysis.
-
Improving the triple bottom line returns from smallholder Tree Farms in the Philippines: A systems approach
2009Co-Authors: John L. Herbohn, Steve Harrison, Jerome K. Vanclay, Eduardo O. Mangaoang, Edwin Cedamon, Nestor Gregorio, Iean W. Russell, Grant Wardell-johnsonAbstract:This paper outlines the application of systems thinking in investigating ways to improve the returns to smallholder Tree farmers in the Philippines. The paper illustrates how a systems approach was used in the conceptualisation of the project and how systems thinking facilitated a shared understanding of the how each individual’s research contributed to the broader project activities. Systems thinking has also been used in the design and implementation of various project activities. Three examples are provided. The first example illustrates how a systems diagram was developed which outlined the direct and indirect linkages between biophysical data on Tree Farms and various activities designed to increase returns. The second example illustrates how the suggested approach for improving the flow of information concerning Tree registration, harvest and transportation regulations and approval mechanisms link with various project activities and have been informed by a series of action research workshops. The third example illustrates how systems thinking has been applied to understand the factors affecting the production of high quality Tree seedlings and to investigate the effect of policy interventions on improving the quality of seedlings available to smallholders.
-
Transhipment model to explore marketing options for smallholder forestry on Leyte Island, The Philippines
2009Co-Authors: Edwin Cedamon, John L. Herbohn, Steve HarrisonAbstract:Transhipment modelling has been used to identify the optimal location of marketing facilities for many commodities. This approach is being used to analyse timber marketing options for smallholder Tree Farms on Leyte Island, the Philippines. The model is designed to evaluate the optimal location of smallholder timber processing and the economic benefits of pruning, thinning and improved planting stock. The analysis will provide input to support policy and investment decisions that are critical for smallholder Tree farm enterprises.
-
Reliability of the Barangay-based smallholder Tree farm inventory: Research and policy implications
2009Co-Authors: Edwin Cedamon, John L. Herbohn, Stephen R. Harrison, Eduardo O. MangaoangAbstract:The reliability of the inventories of smallholder Tree Farms conducted by barangay chairmen in selected municipalities in Leyte has been evaluated. The average number of Trees per farm reported in the barangay-based inventory is 40 while the average verified number of Trees is 49. The average stand age reported is 9.25 while the verified stand age is 9.03. No significant difference was found between the barangay-based inventory and verified data in terms of number of Trees and stand age. Regression analysis shows that the difference in number of Trees reported and the verified number of Trees is directly proportional to the aggregate number of Trees grown, thus the more Trees grown, the higher the difference. The species reported by barangay-chairmen were found to be correct although some of them were reported using local names. The response rate of barangay chairmen in conducting the barangay-based inventory was acceptably high.
Mauricio Galleguillos - One of the best experts on this subject based on the ideXlab platform.
-
Integrating socio-ecological dynamics into land use policy outcomes: A spatial scenario approach for native forest conservation in south-central Chile
Land Use Policy, 2019Co-Authors: Daniela Manuschevich, Pablo Sarricolea, Mauricio GalleguillosAbstract:Abstract Chile is one of the first documented nations to undergo a forest transition dominated by Tree farm expansion. Scenario modelling can inform the possible outcomes of forest conservation policies, especially when the scenarios are rooted in the political dynamics that shaped the current legislation. In Chile, Tree Farms of non-native Radiata Pine and Eucalyptus provide a fast return on investment. Today, fast-growing plantations compete for land area with forest conservation, putting the unique bundle of ecosystem services provided by the latter at risk. Based on a previous political analysis, we propose scenarios projected to 2030 to compare a business-as-usual scenario with A) a conservation scenario based on strict land use restrictions B) an optimistic conservation scenario; C) an unrestricted industrial land use scenario; and D) a restricted industrial land use scenario. The scenarios differ in terms of the implemented policy instruments and the land area required for each land use. We compared these scenarios in terms of carbon stock, control of erosion and wood production, all of which are relevant in the current Chilean political debate. A conservation scenario (A), that combines incentives and restrictions, would imply the largest increase in native forest and regulation services, namely carbon stock and erosion control. In contrast, an unrestricted industrial land use scenario (C) leads to the worst outcomes in terms of erosion compared to a business-as-usual scenario. This study seeks to link political and economic processes underpinning land use change to environmental outcomes, while contributing to the larger discussion on forest policy, forest transitions and environmental outcomes.
H A Phan - One of the best experts on this subject based on the ideXlab platform.
-
Tree Farms for Tree based multicast schemes in peer to peer overlay networks
International Conference on Communications, 2010Co-Authors: P Fraigniaud, H A PhanAbstract:We extend and relax the concept of Tree-farm previously implicitly introduced for the design of the multicast protocol SplitStream. Our extension enables the Tree-farm concept to be applied to non vertex-symmetric overlay networks. In particular, we demonstrate that, in the case of the de Bruijn overlay network used in P2P systems such as Koorde and D2B, our relaxed notion of Tree-farm achieves higher multicast throughput than when using a single BFS Tree rooted at every source, or when the sources share a common set of Trees like in PrefixStream.
-
ICC - "Tree-Farms" for Tree-Based Multicast Schemes in Peer-to-Peer Overlay Networks
2010 IEEE International Conference on Communications, 2010Co-Authors: P Fraigniaud, H A PhanAbstract:We extend and relax the concept of Tree-farm previously implicitly introduced for the design of the multicast protocol SplitStream. Our extension enables the Tree-farm concept to be applied to non vertex-symmetric overlay networks. In particular, we demonstrate that, in the case of the de Bruijn overlay network used in P2P systems such as Koorde and D2B, our relaxed notion of Tree-farm achieves higher multicast throughput than when using a single BFS Tree rooted at every source, or when the sources share a common set of Trees like in PrefixStream.
Daniela Manuschevich - One of the best experts on this subject based on the ideXlab platform.
-
Integrating socio-ecological dynamics into land use policy outcomes: A spatial scenario approach for native forest conservation in south-central Chile
Land Use Policy, 2019Co-Authors: Daniela Manuschevich, Pablo Sarricolea, Mauricio GalleguillosAbstract:Abstract Chile is one of the first documented nations to undergo a forest transition dominated by Tree farm expansion. Scenario modelling can inform the possible outcomes of forest conservation policies, especially when the scenarios are rooted in the political dynamics that shaped the current legislation. In Chile, Tree Farms of non-native Radiata Pine and Eucalyptus provide a fast return on investment. Today, fast-growing plantations compete for land area with forest conservation, putting the unique bundle of ecosystem services provided by the latter at risk. Based on a previous political analysis, we propose scenarios projected to 2030 to compare a business-as-usual scenario with A) a conservation scenario based on strict land use restrictions B) an optimistic conservation scenario; C) an unrestricted industrial land use scenario; and D) a restricted industrial land use scenario. The scenarios differ in terms of the implemented policy instruments and the land area required for each land use. We compared these scenarios in terms of carbon stock, control of erosion and wood production, all of which are relevant in the current Chilean political debate. A conservation scenario (A), that combines incentives and restrictions, would imply the largest increase in native forest and regulation services, namely carbon stock and erosion control. In contrast, an unrestricted industrial land use scenario (C) leads to the worst outcomes in terms of erosion compared to a business-as-usual scenario. This study seeks to link political and economic processes underpinning land use change to environmental outcomes, while contributing to the larger discussion on forest policy, forest transitions and environmental outcomes.
