Current site productivity estimates for red pine (Pinus resinosa) in the Lake States are based on old normal yield tables for unmanaged (unthinned) stands. New growth models, based on permanent remeasured plots, indicate that expected yields of merchantable cubic-foot volume from unthinned stands are 18 percent higher, and from thinned stands 32 percent higher than current estimates on average sites. On better sites the differences are greater. Proposed new productivity curves are strongly supported by red pine yields reported in the literature.
{"title":"New Site Productivity Estimates for Red Pine in the Lake States","authors":"Allen L. Lundgren","doi":"10.1093/jof/81.11.714","DOIUrl":"https://doi.org/10.1093/jof/81.11.714","url":null,"abstract":"Current site productivity estimates for red pine (Pinus resinosa) in the Lake States are based on old normal yield tables for unmanaged (unthinned) stands. New growth models, based on permanent remeasured plots, indicate that expected yields of merchantable cubic-foot volume from unthinned stands are 18 percent higher, and from thinned stands 32 percent higher than current estimates on average sites. On better sites the differences are greater. Proposed new productivity curves are strongly supported by red pine yields reported in the literature.","PeriodicalId":15821,"journal":{"name":"Journal of Forestry","volume":"3 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140574369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dylan H. Jenkins, Daniel A. Devlin, Nels C. Johnson, Stephanie P. Orndorff
Pennsylvania has embarked on establishing a half-million-acre old-growth system within its 2.1 million acres of state forest. If successful, this system will contribute to the restoration of ecological functions associated with old-growth forests that have virtually disappeared from eastern ecosystems. However, the proposed old-growth forests must be resurrected from fragmented and structurally homogenous second-growth forests that are subject to anthropogenic disturbances. In the context of these disturbances, thoughtful system design and, in many instances, application of silvicultural practices will be necessary to protect, restore, and accelerate the accumulation of old-growth attributes in Pennsylvania's forests. We explore some initial design and management considerations for creating an eastern old-growth system.
{"title":"System Design and Management for Restoring Penn's Woods","authors":"Dylan H. Jenkins, Daniel A. Devlin, Nels C. Johnson, Stephanie P. Orndorff","doi":"10.1093/jof/102.3.30","DOIUrl":"https://doi.org/10.1093/jof/102.3.30","url":null,"abstract":"Pennsylvania has embarked on establishing a half-million-acre old-growth system within its 2.1 million acres of state forest. If successful, this system will contribute to the restoration of ecological functions associated with old-growth forests that have virtually disappeared from eastern ecosystems. However, the proposed old-growth forests must be resurrected from fragmented and structurally homogenous second-growth forests that are subject to anthropogenic disturbances. In the context of these disturbances, thoughtful system design and, in many instances, application of silvicultural practices will be necessary to protect, restore, and accelerate the accumulation of old-growth attributes in Pennsylvania's forests. We explore some initial design and management considerations for creating an eastern old-growth system.","PeriodicalId":15821,"journal":{"name":"Journal of Forestry","volume":"47 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140590879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
David Mercker, Ryan Blair, Don Tyler, Theresa Jain, Russell Graham, Donald Rockwood, Nicholas Koch, Jeremy Brawner, Omar Carrero, Kristofer Covey, Alex Barrett, Mark Ashton, Kristofer Covey, Angela Gupta, Julie Miedtke, Amy Mayer, Paul Scowcroft, Justin Yeh, Nathan Beane, James Rentch, Thomas Sensenig, Jingjing Liang, Michael Kane, Dehai Zhao, Bruce Borders, John Rheney, Bridget McNassar, Jake Kleinknecht, Anthony S. Davis, Michael Farrell, Stephanie Downs, Dave Apsley, Daniel Balser, Songlin Fei, Ningning Kong, Kim Steiner, Keith Moser, Erik Steiner, Emily Overton, Anthony S. Davis, Daniel Adamski, Nicklos Dudley, Clifford Morden, Dulal Borthakur, Matthew Aghai, Jeremy Pinto, Anthony S. Davis, James Guldin, Nancy Koerth, Lisa Ganio, Robert Progar, Matt Rinella, Kevin Ceder, Eric Turnblom, Douglas Cram, Terrell Baker, Elise Suronen, Beth Newingham, Leah Rathbun, Andrew Sanchez Meador, Jesse Kreye, Michael McClellan, Erik Berg, Barry Clinton, Jim Vose, Wayne Swank, Jeremy Pinto, R. Kasten Dumroese, Anthony S. Davis, John D. Marshall, Doug Piirto, Joshua Soderlund, Gary Roller, Jeremy Pinto, R. Kasten Dumroese, Anthony S. Davis, John D. Marshall, Ken Zielke, Harry Nelson, David Perez, Katherine Eisen
2Over the past several decades, federal incentive programs have encouraged the restoration of bottomland forests throughout the West Gulf Coastal Plain (WGCP) and the Lower Mississippi Alluvial Valley (LMAV). Programs such as the Conservation Reserve (CRP) and Wetlands Reserve (WRP) Programs have been marginally successful (Stanturf et al. 2001). Foresters and contractors often follow conventional tree planting procedures that are well established for upland sites, but prove problematic in bottomlands. High water tables, soil drainage and compaction, overland flooding and diverse soil properties make species selection difficult. Slight changes in topography and soil structure often have a dramatic effect on survival and growth of planted oak seedlings (Hodges and Schweitzer 1979). This project documented the survival and growth of six-year old seedlings that were established on a bottomland site in 2004, located at the West Tennessee Research and Education Center, Jackson, Tennessee. The purpose was to determine how soil drainage as indicated by mottling (specifically, the point of 50 percent gray color throughout the soil profile) affects the survival and growth of bottomland oak species. The findings suggest that practitioners plant Nuttall, pin and overcup oaks in poorly drained soils. As the drainage improves, begin mixing in willow oak. In the best drained soils (if they exist), finish by including water, swamp chestnut, swamp white, Shumard, cherrybark and bur oaks. Potential species diversity should expand as the soil drainage improves.
{"title":"Silviculture and Forest Ecology","authors":"David Mercker, Ryan Blair, Don Tyler, Theresa Jain, Russell Graham, Donald Rockwood, Nicholas Koch, Jeremy Brawner, Omar Carrero, Kristofer Covey, Alex Barrett, Mark Ashton, Kristofer Covey, Angela Gupta, Julie Miedtke, Amy Mayer, Paul Scowcroft, Justin Yeh, Nathan Beane, James Rentch, Thomas Sensenig, Jingjing Liang, Michael Kane, Dehai Zhao, Bruce Borders, John Rheney, Bridget McNassar, Jake Kleinknecht, Anthony S. Davis, Michael Farrell, Stephanie Downs, Dave Apsley, Daniel Balser, Songlin Fei, Ningning Kong, Kim Steiner, Keith Moser, Erik Steiner, Emily Overton, Anthony S. Davis, Daniel Adamski, Nicklos Dudley, Clifford Morden, Dulal Borthakur, Matthew Aghai, Jeremy Pinto, Anthony S. Davis, James Guldin, Nancy Koerth, Lisa Ganio, Robert Progar, Matt Rinella, Kevin Ceder, Eric Turnblom, Douglas Cram, Terrell Baker, Elise Suronen, Beth Newingham, Leah Rathbun, Andrew Sanchez Meador, Jesse Kreye, Michael McClellan, Erik Berg, Barry Clinton, Jim Vose, Wayne Swank, Jeremy Pinto, R. Kasten Dumroese, Anthony S. Davis, John D. Marshall, Doug Piirto, Joshua Soderlund, Gary Roller, Jeremy Pinto, R. Kasten Dumroese, Anthony S. Davis, John D. Marshall, Ken Zielke, Harry Nelson, David Perez, Katherine Eisen","doi":"10.1093/jof/109.8.491","DOIUrl":"https://doi.org/10.1093/jof/109.8.491","url":null,"abstract":"2Over the past several decades, federal incentive programs have encouraged the restoration of bottomland forests throughout the West Gulf Coastal Plain (WGCP) and the Lower Mississippi Alluvial Valley (LMAV). Programs such as the Conservation Reserve (CRP) and Wetlands Reserve (WRP) Programs have been marginally successful (Stanturf et al. 2001). Foresters and contractors often follow conventional tree planting procedures that are well established for upland sites, but prove problematic in bottomlands. High water tables, soil drainage and compaction, overland flooding and diverse soil properties make species selection difficult. Slight changes in topography and soil structure often have a dramatic effect on survival and growth of planted oak seedlings (Hodges and Schweitzer 1979). This project documented the survival and growth of six-year old seedlings that were established on a bottomland site in 2004, located at the West Tennessee Research and Education Center, Jackson, Tennessee. The purpose was to determine how soil drainage as indicated by mottling (specifically, the point of 50 percent gray color throughout the soil profile) affects the survival and growth of bottomland oak species. The findings suggest that practitioners plant Nuttall, pin and overcup oaks in poorly drained soils. As the drainage improves, begin mixing in willow oak. In the best drained soils (if they exist), finish by including water, swamp chestnut, swamp white, Shumard, cherrybark and bur oaks. Potential species diversity should expand as the soil drainage improves.","PeriodicalId":15821,"journal":{"name":"Journal of Forestry","volume":"47 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140590884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Province of British Columbia in managing its timber lands and in working toward the stabilization of the lumber industry has problems that differ little from those of the United States. British Columbia’s method of attack is, however, different. The author gives data on the extent of the Province’s timber resources, problems of its lumber industry, the responsibility of the state and private owner, and tells what his government is doing to relieve the pressure to liquidate holdings, improve marketing and make the forestry industries permanent.
{"title":"Forestry and Lumbering in British Columbia","authors":"P. Z. Caverhill","doi":"10.1093/jof/29.7.1067","DOIUrl":"https://doi.org/10.1093/jof/29.7.1067","url":null,"abstract":"The Province of British Columbia in managing its timber lands and in working toward the stabilization of the lumber industry has problems that differ little from those of the United States. British Columbia’s method of attack is, however, different. The author gives data on the extent of the Province’s timber resources, problems of its lumber industry, the responsibility of the state and private owner, and tells what his government is doing to relieve the pressure to liquidate holdings, improve marketing and make the forestry industries permanent.","PeriodicalId":15821,"journal":{"name":"Journal of Forestry","volume":"25 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140590890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Annual aboveground wood increment in the world's forests is approximately 12.9 billion metric tons. At 50 percent accessibility, about 6.5 billion tons are available for all wood uses. On the assumption of 3.5 x 106 kcal/ton of air-dried wood, a thermal-electric conversion of about 35 percent, and a power station running at 60 percent operating efficiency, then one megawatt per year requires about 6,200 tons of wood annually. Therefore, if all wood was used for electrical generation, maximum production from the world's forests would amount to 1.0 x 106 mWe (megawatts electric), without dipping into capital. This is roughly twice the equivalent of the present U.S. generating capacity, and half that projected for the year 2000.
{"title":"Potential of Forest Fuels for Producing Electrical Energy","authors":"Robert L. Burgess","doi":"10.1093/jof/76.3.154","DOIUrl":"https://doi.org/10.1093/jof/76.3.154","url":null,"abstract":"Annual aboveground wood increment in the world's forests is approximately 12.9 billion metric tons. At 50 percent accessibility, about 6.5 billion tons are available for all wood uses. On the assumption of 3.5 x 106 kcal/ton of air-dried wood, a thermal-electric conversion of about 35 percent, and a power station running at 60 percent operating efficiency, then one megawatt per year requires about 6,200 tons of wood annually. Therefore, if all wood was used for electrical generation, maximum production from the world's forests would amount to 1.0 x 106 mWe (megawatts electric), without dipping into capital. This is roughly twice the equivalent of the present U.S. generating capacity, and half that projected for the year 2000.","PeriodicalId":15821,"journal":{"name":"Journal of Forestry","volume":"8 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140574363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As the economies of the Balkan countries evolve, their forestry sectors are also in transition. In some countries, the forest sector transformation is close to meeting government objectives, whereas in other countries, the process has just begun. The process of forest sector transition is fraught with numerous problems; some because of entrenched past practices, while others are the consequences of a lack of knowledge or vision of how to move forward. One significant challenge for all Balkan countries is the implementation of effective wood sales systems. This article presents results from research conducted on wood-sale systems found in the Balkan region and suggests recommendations for improvement. The authors suggest continuation of cooperation between Balkan governments and international organizations and institutions, strengthening mutual cooperation and understanding between governments and industry, accelerating changes in legislation, and promoting timber sale compatibility with European Union countries.
{"title":"Timber-Sale Systems in the Balkan Region","authors":"Branko Glavonjic, Richard Vlosky","doi":"10.1093/jof/106.4.206","DOIUrl":"https://doi.org/10.1093/jof/106.4.206","url":null,"abstract":"As the economies of the Balkan countries evolve, their forestry sectors are also in transition. In some countries, the forest sector transformation is close to meeting government objectives, whereas in other countries, the process has just begun. The process of forest sector transition is fraught with numerous problems; some because of entrenched past practices, while others are the consequences of a lack of knowledge or vision of how to move forward. One significant challenge for all Balkan countries is the implementation of effective wood sales systems. This article presents results from research conducted on wood-sale systems found in the Balkan region and suggests recommendations for improvement. The authors suggest continuation of cooperation between Balkan governments and international organizations and institutions, strengthening mutual cooperation and understanding between governments and industry, accelerating changes in legislation, and promoting timber sale compatibility with European Union countries.","PeriodicalId":15821,"journal":{"name":"Journal of Forestry","volume":"275 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140574364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In Conserving Words: How American Nature Writers Shaped the Environmental Movement, Daniel J. Philippon studies how five key figures in environmental history tried to rein in civilization while championing Nature.
在《保护文字：丹尼尔-J.-菲利蓬（Daniel J. Philippon）在《保护文字：美国自然作家如何塑造环境运动》一书中，研究了环境史上的五位重要人物如何在捍卫自然的同时，试图控制文明。
{"title":"New Releases: Conserving Words: How American Nature Writers Shaped the Environmental Movement","authors":"Char Miller","doi":"10.1093/jof/102.2.54","DOIUrl":"https://doi.org/10.1093/jof/102.2.54","url":null,"abstract":"In Conserving Words: How American Nature Writers Shaped the Environmental Movement, Daniel J. Philippon studies how five key figures in environmental history tried to rein in civilization while championing Nature.","PeriodicalId":15821,"journal":{"name":"Journal of Forestry","volume":"35 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140574366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dot-count sampling to estimate area from 1:12,000 scale aerial photographs was tested with grid densities of 4, 16, and 49 dots per square inch. All three densities gave unbiased estimates. Variances may be validly estimated by assuming random sampling and the binomial model when dot density is greater than 27--the optimum density for per-dot reduction in variance. The coefficient of variation can be predicted from dot density of the grid and estimated proportion of dots in the cover type of interest.
{"title":"Optimum Dot-Grid Density for Area Estimation with Aerial Photographs","authors":"Lawrence R. Gering, Robert L. Bailey","doi":"10.1093/jof/82.7.428","DOIUrl":"https://doi.org/10.1093/jof/82.7.428","url":null,"abstract":"Dot-count sampling to estimate area from 1:12,000 scale aerial photographs was tested with grid densities of 4, 16, and 49 dots per square inch. All three densities gave unbiased estimates. Variances may be validly estimated by assuming random sampling and the binomial model when dot density is greater than 27--the optimum density for per-dot reduction in variance. The coefficient of variation can be predicted from dot density of the grid and estimated proportion of dots in the cover type of interest.","PeriodicalId":15821,"journal":{"name":"Journal of Forestry","volume":"41 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140574371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The benefits of a strong professional (and personal) network are clear. But how do we go about building such a network?
一个强大的职业（和个人）网络的好处显而易见。但我们该如何建立这样一个网络呢？
{"title":"Focus on ... Professional Development: The Value of Networking","authors":"C.D. Webb, R. Staebler","doi":"10.1093/jof/100.7.4","DOIUrl":"https://doi.org/10.1093/jof/100.7.4","url":null,"abstract":"The benefits of a strong professional (and personal) network are clear. But how do we go about building such a network?","PeriodicalId":15821,"journal":{"name":"Journal of Forestry","volume":"47 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140590881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Coefficients have been derived to facilitate use of Behre's hyperbola for estimating volumes of upland hardwoods. The system shows promise for volume-table development and modeling purposes.
得出的系数便于使用贝氏双曲线估算高地硬木的体积。该系统有望用于体积表的编制和建模。
{"title":"Estimating Volumes of Upland Hardwoods with the Behre Hyperboloid","authors":"Harry V. Wiant, Philip M. Charlton","doi":"10.1093/jof/82.3.173","DOIUrl":"https://doi.org/10.1093/jof/82.3.173","url":null,"abstract":"Coefficients have been derived to facilitate use of Behre's hyperbola for estimating volumes of upland hardwoods. The system shows promise for volume-table development and modeling purposes.","PeriodicalId":15821,"journal":{"name":"Journal of Forestry","volume":"161 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140590896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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