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| Registros recuperados: 311 | |
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| McConnell, Virginia D.; Kopits, Elizabeth; Walls, Margaret. |
| Transferable development rights (TDRs) can be used as a local planning tool to preserve land for particular uses. TDRs separate ownership of the right to develop land from ownership of the land itself, creating a market in which the development rights can be bought and sold. Landowners who sell TDRs permanently preserve their land in an undeveloped state; those TDRs are then used to increase the density of development elsewhere. In this paper, we evaluate a TDR program for preserving farmland in Calvert County, Maryland. We evaluate the performance of the TDR market over the 23-year life of the program by looking at the number of transactions and TDRs sold and the level and dispersion of prices over time. We also look closely at the influence of the county... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Land use; Farmland preservation; Development rights; Land Economics/Use; Q15; Q24; R140. |
| Ano: 2003 |
URL: http://purl.umn.edu/10659 |
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| Araujo,Jane Kelly Silva; Ribeiro,Mateus Rosas; Corrêa,Marcelo Metri; Galindo,Izabel Cristina de Luna; Souza Júnior,Valdomiro Severino de. |
| The Garanhuns Plateau in the Agreste region of the State of Pernambuco, Brazil is characterized by humid climatic conditions due to orographic rains, unlike the surrounding semiarid region. These soils are subjected to intense agricultural use and are extremely important for the regional economy. This study was carried out in the municipality of Brejão in the Agreste region with the aim of assessing changes in humic Haplustox soils subjected to different land uses. Four plots with different vegetation covers (native forest, secondary shrubby vegetation (capoeira), traditional cropping system, and planted pasture) were selected, and samples were taken from a soil profile and four small pits surrounding it at each site. Physical and chemical properties were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Land use; Highland soils; Humic substances; Aggregate stability; Microbial biomass C. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400029 |
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| ANDRADE, C. C. de; FIDALGO, E. C. C.; FRANCISCO, C. N.. |
| Este trabalho foi desenvolvido com o objetivo de mapear o uso e cobertura da terra na região de Nova Canaã, Mato Grosso, MT, visando identificar padrões para o reconhecimento de sistemas de produção existentes nas áreas agropecuárias. Para tal, foi utilizada a série temporal do período entre 2017 e 2018 das imagens do sensor Sentinel-2, com resolução espacial de 10 metros. Foram empregadas técnicas de análise baseada em objetos e mineração de dados, devido à grande quantidade de dados a serem processados e analisados. Como resultado, foi possível diferenciar as classes de uso e cobertura da terra: agricultura (dois diferentes padrões), pastagem, vegetação natural e água, com exatidão global de mapeamento de 73,5% e estatística Kappa de 0,62. A metodologia... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Análise de imagem baseada em objetos; Sentinel-2; Sensoriamento Remoto; Uso da Terra; Sistema de Produção; Remote sensing; Land use. |
| Ano: 2020 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1123475 |
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| Samarasinghe, Oshadhi; Daigneault, Adam J.; Greenhalgh, Suzie; Munguia, Oscar Montes de Oca; Walcroft, Jill. |
| This paper uses responses from a regional farmer survey that identify farmers’ perceptions of environmental policies to calibrate a catchment-level environmental economic model (NZ-FARM) to estimate the impacts of a nutrient reduction policy in North Canterbury, New Zealand. The model maximizes farm income across a catchment, accounting for changes in land use, farm output, nutrient leaching, and GHG emissions. Simulations estimate that reducing nutrient loads by 15–30% can be achieved with economic impacts ranging between 1 and 10%, based on how willing landowners are to change how they manage their farm. Farmers are often hesitant to implement certain mitigation options, however, which results in higher economic costs than the ‘optimal’ estimates.... |
| Tipo: Presentation |
Palavras-chave: Agriculture and forestry modelling; Land use; Nutrient budgeting; Water quality; Greenhouse gas emissions; Farmer perception towards policy; Agricultural and Food Policy. |
| Ano: 2012 |
URL: http://purl.umn.edu/124439 |
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| Crosson, Pierre; Frederick, Kenneth D.. |
| Human activities have resulted in the loss of about half of the original 221 million acres of wetlands in the conterminous 48 states. Federal laws, policies, and programs have had major impacts on the nation's wetland resources. Initially, they encouraged and subsidized the draining and filling of wetlands, the flooding of wetlands behind dams, and the diversion and alteration of streamflows to riparian wetlands. More recently, federal policies have been directed to conserving and preventing further net losses. The focus of this study is on the impacts of federal policies on riparian wetlands, i.e., those formed at the interface of rivers and streams and uplands and that require occasional flooding to maintain the health of their ecosystems. The study... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Wetlands; Land use; Agricultural policy; Water policy; Environmental Economics and Policy; Q15; Q25; R14. |
| Ano: 1999 |
URL: http://purl.umn.edu/10579 |
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| Alig, Ralph J.; Adams, Darius M.; McCarl, Bruce A.. |
| The forest and agriculture sectors are linked by having a portion of their land bases suitable for use in either sector. A substantial part of the southern land base is suitable for either forestry or agriculture use, with most of forestation on U.S. agriculture land in the South. We examine how land exchanges between forestry and agriculture are influenced by specific federal conservation and farm support policies, including changes in the Conservation Reserve Program. Reallocation of land is a significant part of the sectors' responses to the policies, along with intensification of timber management on existing southern forests. |
| Tipo: Journal Article |
Palavras-chave: Agriculture; Conservation; Forest sector; Land use; Projections; Land Economics/Use. |
| Ano: 1998 |
URL: http://purl.umn.edu/15557 |
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| Aguiar,Wagner de; Sampaio,Silvio C.; Paisani,Julio C.; Reis,Ralpho R. dos. |
| ABSTRACT Changes in the Brazilian Forest Code (BFC) have soften the criteria for recovery and conservation of permanent preservation areas (PPAs), enhancing processes related to surface runoff. The aim of this study is to understand the effects of changes in PPA classification criteria established by BFC of 2012 to the detriment of BFC from 1965 considering the surface runoff response in the basin draining the upper Marrecas River valley in the flow peaks. The HEC–HMS model was used to simulate flow peaks considering three land-use scenarios, representative of the current use, adapting it to PPAs fitted to the BFC of 1965 and 2012 and seven precipitation return periods. In the proposed scenarios, the use of BFC of 2012, to the detriment of that from 1965,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Surface runoff; Forestry legislation; Hydrological simulation; Land use. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000200277 |
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| Ashley, C.. |
| Namibia is the most arid country south of the Sahara, with an economy fundamentally reliant on natural resources. The most scarce resource is water, and the main economic sectors are mining, fishing, agriculture, and wildlife-based tourism. The majority of the population live in rural areas, dependent on a wide range of natural resources. Sustainable use and conservation of biodiversity are therefore essential for the future. The question is how to achieve it? One key strategy is to assess -- and where necessary redesign -- economic incentives affecting use of natural resources. This paper illustrates the role of economic incentives in influencing the use of land-based renewable natural resources (RNR). It identify incentives which are being, or need to... |
| Tipo: Other |
Palavras-chave: Land use; Biodiversity; Conservation. |
| Ano: 1996 |
URL: http://hdl.handle.net/1834/537 |
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| Ahmed, Selena; New York Botanical Garden; selenaahmed@aol.com; Stepp, John R; University of Florida; stepp@ufl.edu; Toleno, Robban A. J.; University of British Columbia; robban@interchange.ubc.ca; Peters, Charles M; New York Botanical Garden; cpeters@nybg.org. |
| This study assesses the persistence and change of traditional land use patterns and ecological knowledge in response to expanded commercialization of tea (Camellia sinensis var. assamica (L.) Kuntze Theaceae in an indigenous Akha (Hani) community in the midlevel montane forests of southwest Yunnan, China. Surveys were conducted in 2005 and 2008, over a period corresponding to a regional tea market boom and bust cycle, to compare the valuation smallholders attribute to land use types and to determine the role that value systems play in shaping environmental behavior and knowledge. At the community level, increased market integration of tea agroforests is associated with reconfiguration of land use, intensified management, reorganization of labor structures,... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Ecological knowledge; Land use; Natural resource commercialization; Social networks; Tea (Camellia sinensis). |
| Ano: 2010 |
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| Silva,Daniela M.L.; Camargo,Plínio B.; Mcdowell,William H.; Vieira,Ivan; Salomão,Marcos S.M.B.; Martinelli,Luiz A.. |
| Streamwater is affected by several processes in the watershed including anthropogenic activities that result in changes in water quality as well as in the functioning of these stream ecosystems. Therefore, this work aims to evaluate the concentration of major ions (Ca2+, Mg2+, Na+, K+, NH4+, NO3-, NO2-, Cl-, SO4(2-), PO4(3-), HCO3-) in streams in the state of São Paulo (southeast Brazil). The sampling sites are located at undisturbed (ombrophilus dense forest, semideciduous forest and savanna - cerrado) and disturbed areas (pasture, urbanization and sugar cane crops). Streamwater chemistry varied according to land use change and, in general, was higher in disturbed sites. Streams located in undisturbed sites at Ribeira de Iguape/Alto Paranapanema watershed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydrochemistry; Land use; Streams; Watersheds. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000400007 |
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| Registros recuperados: 311 | |
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