نتایج جستجو برای: fallow lands and forest in central zones

تعداد نتایج: 21788340  

Human interventions in natural areas as a change in land use have led to a domino effect of anomalies and then environmental hazards. These extensive and cumulative changes in land cover and land use have manifested themselves in the form of anomalies such as the formation of severe runoff, soil erosion, the spread of desertification, and salinization of the soil. The main purpose of this study...

The land-use change, cutting forest trees and the grasslands conversion to agricultural lands destroyed natural ecosystems and also current or future production capacity reduce and these are harmful effects on the soil physicochemical characteristics. This study taken with aim, checking the role of forest-land change on some soil physical-chemical characteristics and then identify some effectiv...

Habibnejad , M., Kavyan , A., Mola Aghajanzadeh , S., Rahmani , M., Soleymani , K.,

Aims: Land-use change due to human activities is one of the important issues in regional and development planning. The aim of this study was to detect land-use changes using Landsat TM, ETM+, IRS and ASTER satellite imagery. Methodology: In this quasi-experimental study, land-use changes in the Haraz watershed over a 23-year period were evaluated. For this study, images of 1992 TM, ETM + 2002, ...

2005
Frederick J. Swanson

Historical forest landscape dynamics include consideration of spatial and temporal distributions of forest conditions over recent history and also historical disturbance regimes. Understanding of historical landscape dynamics in these senses is relevant to planning future management of federal forest lands on both policy and ecological grounds. Although some particular elements of our policy fr...

2002

In 1995, the Philippines officially adopted Community-Based Forest Management (CBFM) as its strategy for sustainable forest management in recognition of the urgent need to put “social fences” in open access forests and forest lands. CBFM was conceptualized to partly respond to the issue of the state as being the biggest “absentee landlord” by recognizing de-facto resource management of communit...

Journal: :Conservation biology : the journal of the Society for Conservation Biology 2006
Dominick A DellaSala Jack E Williams

Natural resource extraction and environmentalism are deeply engrained in the social fabric of the Pacific Northwest (U.S.A.) and are often pitted against one another in age-old timber wars that reached a climax in the 1980s and early 1990s. No other species typified these battles more than the Northern Spotted Owl (Strix occidentalis caurina), whose listing pursuant to the Endangered Species Ac...

2002
James M. Guldin

Public timberlands represent the smallest of major ownership classes in Arkansas; of the State’s 18.38 million ac of timberland, the public owns 3.198 million ac, or 17.4 percent. Of that total, > 85 percent is in Federal ownership (70.8 percent in national forests). State lands account for 12.4 percent, and county and municipal lands, about 2 percent. Compared to other ownerships, public timbe...

Journal: :Ecological applications : a publication of the Ecological Society of America 2017
Megan K Creutzburg Robert M Scheller Melissa S Lucash Stephen D LeDuc Mark G Johnson

Balancing economic, ecological, and social values has long been a challenge in the forests of the Pacific Northwest, where conflict over timber harvest and old-growth habitat on public lands has been contentious for the past several decades. The Northwest Forest Plan, adopted two decades ago to guide management on federal lands, is currently being revised as the region searches for a balance be...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده ادبیات و زبانهای خارجی 1390

abstract a fundamental study of “historio-graphic metafiction” and “literary genres”, as introduced in “new historical philosophy”, and tracing them in the works of julian barnes having studied the two novels, the porcupine and arthur & george, by julian barnes, the researcher has applied linda hutcheon’s historio-graphic metafictional theories to them. the thesis is divided into five cha...

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