Analysis of chainsaw cutting patterns

2021 ◽  
Vol 311 ◽  
pp. 42-45
Author(s):  
James A. Bailey ◽  

While timber thefts occur on both public and private lands, it is difficult to prevent illegal cutting of timber in large forested areas. However, when investigators encounter suspected stolen logs, it may be possible to match the cut ends of the logs to stumps in the forest. While cutting a tree, a chainsaw operator may change saw positions so different directional striation patterns on the cut end of a tree may be produced. In this study, 25 samples were cut from a recently harvested tree. Each sample was ~ 3–6 cm in thickness and approximately 11–15 cm in diameter. A Stihl Model 290 gasoline powered chainsaw with a chipper chain equipped with a 50 cm bar was used to cut the samples. Fifty cut ends were examined for directional striation changes on the cut end. A classification system was devised to characterize the different patterns.

2018 ◽  
Vol 32 ◽  
pp. 72-83
Author(s):  
Shyamani D. Siriwardena ◽  
Kelly M. Cobourn ◽  
Gregory S. Amacher ◽  
Robert G. Haight

2019 ◽  
Vol 31 (3) ◽  
pp. 406-430
Author(s):  
Peter Siskind

Abstract:This exploration of the politics of land-use reform in New York’s vast Adirondack Mountains provides a revealing window onto the ambiguities, evolution, and importance of environmental liberalism during the 1970s. A distinctive set of circumstances, featuring forceful advocacy by Governor Nelson Rockefeller and propitious political timing, led to the creation in the early 1970s of one of the most ambitious state-level environmental reforms in modern American history. But implementation during the mid- and late 1970s proved challenging. Environmental management by a new regional agency that possessed powerful regulatory authority over all public and private lands in the region produced discontents, distrust, and organized opposition among both developers and property-rights advocates on the right and environmental advocates on the left. The result was an uneasy, enduring legacy: the new regulatory institution and key environmental planning ideas of the early 1970s and the later, wide-ranging discontents would coexist in similar forms for decades to come.


1962 ◽  
Vol 22 (4) ◽  
pp. 445-460 ◽  
Author(s):  
Theodore Saloutos

If by land policy we mean a comprehensive, well-thought-out plan that made for an efficient long-range use of our agricultural resources, we are reasonably safe in saying we had none. If we had anything that came close to resembling a policy, it was that of throwing open vast quantities of public and private lands to cultivation which resulted in maladjustments that made it difficult, if not impossible, for many farmers to adjust themselves to capitalistic methods of production and distribution. The extent of these maladjustments may be gauged in part by observing the status of agriculture on the eve of the New Deal. Shrinking foreign markets, world-wide competition, rising tariff walls, poor farm management practices, and excessive production and distribution costs were accompanied by sharp increases in indebtedness, farm foreclosures, and tenancy. Agriculture was receiving a dwindling share of the national income, capital formation was being discouraged, and farming had been relegated to a subordinate position within the economy.


2008 ◽  
Vol 13 (4) ◽  
pp. 222-233 ◽  
Author(s):  
R. C. Stedman ◽  
P. Bhandari ◽  
A. E. Luloff ◽  
D. R. Diefenbach ◽  
J. C. Finley

2020 ◽  
Vol 117 (47) ◽  
pp. 29577-29583
Author(s):  
Christoph Nolte

The justification and targeting of conservation policy rests on reliable measures of public and private benefits from competing land uses. Advances in Earth system observation and modeling permit the mapping of public ecosystem services at unprecedented scales and resolutions, prompting new proposals for land protection policies and priorities. Data on private benefits from land use are not available at similar scales and resolutions, resulting in a data mismatch with unknown consequences. Here I show that private benefits from land can be quantified at large scales and high resolutions, and that doing so can have important implications for conservation policy models. I developed high-resolution estimates of fair market value of private lands in the contiguous United States by training tree-based ensemble models on 6 million land sales. The resulting estimates predict conservation cost with up to 8.5 times greater accuracy than earlier proxies. Studies using coarser cost proxies underestimate conservation costs, especially at the expensive tail of the distribution. This has led to underestimations of policy budgets by factors of up to 37.5 in recent work. More accurate cost accounting will help policy makers acknowledge the full magnitude of contemporary conservation challenges and can help improve the targeting of public ecosystem service investments.


Author(s):  
Ashan Shooshtarian ◽  
Jay Anthony Anderson ◽  
Glen W. Armstrong ◽  
Martin K. Luckert

A forest-level model is developed that estimates how policies towards hybrid poplar plantations on private and public land impact harvest levels and values for producing biofuel feedstock. We simulate three policy changes: 1) permitting an increase in harvest levels on public land as a result of establishing hybrid poplar plantations on private land; 2) permitting the establishment of hybrid poplar plantations on public land; and 3) including forest carbon emission offsets in the net benefits realized by the forest operator. We are interested in whether the increase in harvest created by the policies might be enough to supply a biorefinery, and how the value of the operation changes. Our results suggest that jointly managing public and private lands under sustained yield can increase harvest by between 7% and 93%, and increase the value of the operation by between 39% and 263%. Results also suggest that hybrid poplar plantations could enable a leaseholder of one million hectares of public forestland to initiate an allowable cut effect and thereby increase harvest enough to supply a new biorefinery, in addition to its existing pulp mill. Carbon offsets further increase the value of the forest, although harvest begins to decline at high carbon prices.


Public ◽  
2020 ◽  
Vol 31 (61) ◽  
pp. 36-89
Author(s):  
Charlie Hailey

When the last U.S. Census canvassed Slab City, a remote, self-governed community of artists, retirees, anarchists and homeless people in southern California’s desert, most of its residents claimed ownership of the plots they occupied as “free and clear.” And yet Slab City itself occupies land that is public, as firm in this designation as the resolve of those who live there. Often called the “last free place,” this square-mile plot is one of the remaining Section 36 areas, which were originally reserved for the state’s public schools when each township was laid out by the National Ordinance’s land surveys that blanketed the American West in an invisible but all-encompassing grid. Consequently, the state of California hosts an array of one-square mile pockets of land. Among these, Slab City is a camp that bears the ongoing question of how land—environmentally inhospitable yet relatively hospitable in its public status—might host practices of self-determination, self-regulated community, and national identity. Veritable blind spots of land management, Section 36 areas contrast other more regulated, though comparable, practices on public and private lands. The Bureau of Land Management oversees Long Term Visitor Areas where campers can park trailers across vast territories for extended periods of time, and Walmart plays host to cross-country travelers who overnight in its parking lots—a permutation of recreational camping known as boondocking. But what happens in the absence of oversight? In places where the campsites become permanent? In times when those living there have arrived not only by choice but also in many cases out of necessity? Legacies of a country’s organizational matrix, Section 36’s pockets of land linger as residual pieces of frontier mythologies, as testaments of the arbitrariness of the grid and its land policies, and as fertile ground for alternative practices of adapting to inhospitable environments and making home in improvised communities. This essay seeks to understand how Section 36 land hosts contemporary intersections of public space and freedom.


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