Consulta: subjectFacets:"Soil degradation"
Registros recuperados: 37
Data/hora: 04/06/2024 13:18:25

Recuperação de áreas de jazidas com espécies de ocorrência natural do Semiárido.
Provedor de dados: 14
Autores: ARAÚJO, F. P. de; BRANDAO, W. N.; MOREIRA, J. N.; TAURA, T. A.; CUNHA, T. J. F.; CORREIA, R. C.
A produção de energia elétrica sustentável por meio da instalação das torres eólicas, no município de Casa Nova, BA, a exemplo de outras localidades, é uma realidade e, se por um lado produz uma energia limpa, por outro lado, necessita construir estradas vicinais cascalhadas, objetivando o transporte das referidas torres, que são constituídas por peças longas e bastante pesadas, que por sua vez exigem caminhões de grande porte. Para a pavimentação foram utilizadas seis jazidas prospectadas, aleatoriamente, dentro da área dos parques no município, que resultaram na retirada de toda avegetação de uma área total de 16,5 hectares, com exceção das espécies ameaçadas de extinção a exemplo do umbuzeiro (Spondias tuberosa Arr.),baraúna (Schinopsis brasiliensis) e...
Tipo: Folhetos
Palavras-chave: Semiárdio; Jazida; Lago de Sobradinho; Torre Eólica; Caatinga; Solo; Degradação Ambiental; Recuperação do Solo; Cobertura Vegetal; Manejo do Solo; Manejo de Água; Natural resources; Arid soils; Soil degradation; Soil management; Soil mineralogy; Soil organic matter; Soil resource management.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1124092

Recuperação de áreas degradadas por erosão no meio rural.
Provedor de dados: 14
Autores: CHAVES, T. de A.; ANDRADE, A. G. de; LIMA, J. A. de S.; PORTOCARRERO, H.
Processos erosivos básicos. A erosão no meio rural. Técnicas para a recuperação de áreas erodidas. Monitoramento e manutenção de áreas recuperadas. Importância de recuperar. Custos de implantação.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Código Florestal; Deterioração do solo; Erosão do solo; Recuperação do solo; Soil degradation; Soil erosion; Land restoration.
Ano: 2012
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/950896

Agregação de um latossolo vermelho sob diferentes sistemas de manejos e de cultivos em Mato Grosso do Sul.
Provedor de dados: 14
Autores: MONTEIRO, L. C.; JUNQUEIRA, P. H.; JESUS JUNIOR, E. de; TOMAZI, M.; SALTON, J. C.
bitstream/item/204982/1/SBSA-1.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Degradação do solo; Cultivation System; Sistema conservacionista; Conservationist system; Livestock Crop Integration; Sistema de Cultivo; Conservação do Solo; Pastagem; Soil conservation; Pastures; Soil degradation.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1114622

Mais pastagens, menos devastação: tecnologia permite redução de queimadas na formação de pastagens.
Provedor de dados: 14
Autores: VALENTIM, J. F.
O estado do Acre, com 152.589 km2, tem como cobertura vegetal predominante a floresta tropical úmida aberta (77%) e densa (14%) (IBDF, 1984). A ocupação da Amazônia e do Acre, em particular, a partir da década de 60, tem sido um processo dirigido através de programas dos governos estadual e federal. Esta ocupação tem como objetivo resolver problemas de natureza social, econômica e política. A relativa escassez de conhecimentos científicos disponíveis sobre os mecanismos que garantem a sobrevivência da floresta pluvial tropical, predominante na região, está longe de permitir que se possa recomendar a exploração, em grande escala e ecologicamente segura, desse fantástico bioma.
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Acre; Amazônia Ocidental; Western amazon.; Degradação do solo; Amazonia occidental; Cultivo mixto; Deforestación; Degradación del suelo; Incendios forestales; Leguminosas forrajeras; Regeneración forestal; Variedades de rendimiento elevado; Floresta; Desmatamento; Queimada; Incêndio florestal; Recuperação do solo; Pastagem consorciada; Leguminosa forrageira; Kudzu; Pueraria phaseoloides; Variedade resistente.; Soil degradation; Deforestation; Forest fires; Forest regeneration; Mixed cropping; Forage legumes; High-yielding varieties; Amazónia.
Ano: 1989
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/510563

Perdas de solo, água e nutrientes pela erosão hídrica em diferentes sistemas de manejo agroflorestal no semi-árido cearense.
Provedor de dados: 14
Autores: CAMPANHA, M. M.; AGUIAR, M. I. de; MAIA, S. M. F.; OLIVEIRA, T. S. de; MENDONÇA, E. de S.; ARAUJO FILHO, J. A. de.
bitstream/CNPC-2010/21729/1/ct37.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Sistema agroflorestal; Sistema agrossilvipastoril; Código florestal; Código floretal; Agrosilvopastoral systems.; Agroforestry systems; Manejo do solo; Nutriente; Caatinga; Perda; Água; Erosão hídrica; Conservação; Recurso natural; Deterioração do solo; Losses from soil; Water erosion; Soil degradation; Semiarid soils.
Ano: 2008
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/534078

Investimentos na saúde dos solos para conciliar produtividade e sustentabilidade na agropecuária brasileira.
Provedor de dados: 14
Autores: VALENTIM, J. F.; AMARAL, E. F. do; REIS, J. C. dos.
Este artigo aborda os principais problemas enfrentados para investimentos em recuperação da saúde do solo em áreas degradadas nos diferentes biomas brasileiros.
Tipo: Artigo de periódico
Palavras-chave: Manejo do Solo; Degradação Ambiental; Políticas Públicas; Agricultura Sustentável; Soil management; Soil degradation; Public policy; Sustainable agriculture.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1149681

Soil Health Changes Over a 25-Year Chronosequence From Forest to Plantations in Rubber Tree (Hevea brasiliensis) Landscapes in Southern Côte d'Ivoire: Do Earthworms Play a Role?
Provedor de dados: 5
Autores: Tondoh, Jérôme E.; Dimobe, Kangbéni; Guéi, Arnauth M.; Adahe, Léontine; Baidai, Yannick; N'Dri, Julien K.; Forkuor, Gerald.
The agro-ecological drawbacks of the spread of rubber tree plantations in Côte d'Ivoire since the 1990's are obvious even though they have not been properly investigated. They consist of biodiversity loss, land degradation and food insecurity, which have extended into the existing cocoa-led degraded areas whose rehabilitation have unfortunately not started. This situation increases not only the threat on soil health status but also undermines the capability of soils to deliver ecosystem services that are key to sustainable agricultural production. The current study took advantage of a chronosequence in rubber tree landscapes to assess soil health deterioration in general and possibly earthworm-mediated role in soil health changes. The hypothesis...
Tipo: Text
Palavras-chave: Biodiversity; Earthworms; Functional groups; Land use change; Soil degradation; Soil threats; Rubber tree plantations.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00504/61555/65462.pdf

Soil organic matter management for tackling desertification
Provedor de dados: 19
Autores: Tsutsuki, Kiyoshi; 筒木, 潔.
2003年8月28日とかちプラザで開催､日本ユネスコ国内委員会主催の帯広農村開発教育国際セミナー(OASERD)国際連合ユネスコアジア太平洋地域教育開発計画事業(APEID)シンポジウム「地球にやさしい農業をめざして : 緑地回復と持続的農業」講演資料
Palavras-chave: Humic substances; Soil aggregate; Soil degradation; Soil organic matter; Land use.
Ano: 2003
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1906

Coutry Profile Environment Ghana
Provedor de dados: 20
This report presents information on the Environment of the Country in the following arrangement: 1 Keywords 2 Fact Sheet 3 Organization 4 Current Environmental Issues 5 International Relations 6 Information Sources 7 References
Tipo: Other
Palavras-chave: Environmental surveys; Pollution; Sanitation; Soil degradation; Deforestation; Http://aims.fao.org/aos/agrovoc/c_14073; Http://aims.fao.org/aos/agrovoc/c_7168; Http://aims.fao.org/aos/agrovoc/c_15590.
Ano: 1999
URL: http://hdl.handle.net/1834/658

Integrated management of watersheds for agricultural diversification and sustainable livelihoods in Eastern and Central Africa
Provedor de dados: 30
Autores: B.
Palavras-chave: Watersheds; Watershed management; Agroecosystems; Strategies; Land improvement; Policies; Resources; Soil degradation; Pigeonpeas; Terrace cropping.
Ano: 2006
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4236

Future of Agriculture in the Semi-Arid Tropics
Provedor de dados: 30
Autores: M.C.S.
Palavras-chave: Water harvesting; Land resources; Tropical zones; Policies; Products; Biotechnology; Soil degradation; Sustainable agriculture; Electrophoresis; Agricultural trade.
Ano: 2001
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3696

Methods for assessing the impacts of natural resource management research
Provedor de dados: 30
Autores: B.
Palavras-chave: Watersheds; Soil degradation; Watershed management; Assets; Policies; Land resources; Water quality; Economics; Water harvesting; Investment.
Ano: 2003
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4231

The use of crop combinations in reducing
Provedor de dados: 30
Autores: K.G.K.
Palavras-chave: Soil degradation; Runoff; Watersheds; Land resources; Crops; Soil management; Investment; Precipitation; Solutions; Resources.
Ano: 1991
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3156

Farmers' Practices and Soil and Water Conservation Programs
Provedor de dados: 30
Autores: International Crops Research Institute for the Semi-Arid Tropics.
Palavras-chave: Watersheds; Bunding; Soil conservation; Soil degradation; Resource conservation; Participation; Land resources; Water harvesting; Subsidies; Moisture conservation.
Ano: 1991
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4094

Integrated management of watersheds for agricultural diversification and sustainable livelihoods in Eastern and Central Africa: lessons and experiences from semi-arid South Asia: proceedings of the International Workshop
Provedor de dados: 30
Autores: Shiferaw, B.
Palavras-chave: Watersheds; Watershed management; Agroecosystems; Strategies; Land improvement; Policies; Resources; Soil degradation; Pigeonpeas; Terrace cropping.
Ano: 2006
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3154

Farming Systems Principles
Provedor de dados: 30
Palavras-chave: Genetic soil types; Soil degradation; Farming systems; Cropping systems; Tropical zones; Arid zones; Pigeonpeas; Intercropping; Fallow systems; Land resources.
Ano: 1986
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4037

Food security and sustainable agriculture in India: The water management challenge
Provedor de dados: 31
Autores: Kumar,   M. Dinesh.
Tipo: Working or Discussion Paper
Palavras-chave: Sustainable agriculture; Food security; Water management; Water scarcity; Groundwater depletion; Waterlogging; Salinity; Soil degradation; Water use efficiency; Productivity; Equity; Irrigation water; Pricing; Agricultural and Food Policy; Agricultural Finance; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Productivity Analysis; Resource /Energy Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/92666

An analytical framework for soil degradation, farming practices, institutions and policy responses
Provedor de dados: 31
Autores: Prager,   Katrin; Schuler,   Johannes; Helming,   Katharina; Zander,   Peter; Ratinger,   Tomas; Hagedorn,   Konrad.
There is a lack of knowledge about the effectiveness and efficiency of soil conservation policies in agriculture and little understanding of how policy measures should be designed to encourage farmers to adopt soil conservation practices. This paper analyzes institutional settings surrounding agricultural soil management in ten European countries based on the Institutions of Sustainability framework. This framework considers the interdependencies between ecological and social systems, taking into account environmental conditions, farming practices impacting on soil conservation, different types of actors, policies, institutions and governance structures. The purpose of this paper is to describe the analytical framework and the methodology that all case...
Tipo: Conference Paper or Presentation
Palavras-chave: Institutional analysis; Soil degradation; Soil conservation policy; Soil conservation measures; Farming practices; Policy evaluation; Farm Management.
Ano: 2011
URL: http://purl.umn.edu/114773

Mapping drought patterns and impacts: a global perspective
Provedor de dados: 31
Autores: Eriyagama,   Nishadi; Smakhtin,   Vladimir U.; Gamage,   Nilantha.
The study examines the global pattern and impacts of droughts through mapping several drought-related characteristics - either at a country level or at regular grid scales. It appears that arid and semi-arid areas also tend to have a higher probability of drought occurrence. It is illustrated that the African continent is lagging behind the rest of the world on many indicators related to drought-preparedness and that agricultural economies, overall, are much more vulnerable to adverse societal impacts of meteorological droughts. The study also examines the ability of various countries to satisfy their water needs during droughts using storage-related indices.
Tipo: Report
Palavras-chave: Drought; Impact assessment; Indicators; Hydrology; Mapping; Climate change; River basins; Dams; Water scarcity; Disasters; Risks; Precipitation; Runoff; Soil degradation; Agricultural and Food Policy; Land Economics/Use.
Ano: 2009
URL: http://purl.umn.edu/57027

Poverty and environmental degradation under trade liberalization: searching for second-best policy options.
Provedor de dados: 31
Autores: Pascual,   Unai; Martinez-Espineira,   Roberto.
Forest based agricultural systems in the tropics are being opened up to international trade at an unprecedented rate. This is the case of tropical agriculture in Mexico under the North American Free Trade Agreement (NAFTA), which is also having significant impacts on the decentralized land use decisions of small-scale farmers and on the natural resource base on which they depend. This paper develops a bioeconomic model of a typical forest-land based farming system that is integrated with the non-farm labour sector, as typically found in tropical regions. The data used to generate the simulations were gathered in two communities of Yucatan (Mexico) in 1998-2000. Through a systemdynamics framework, the agro-ecological and farming economic subsystems are...
Tipo: Journal Article
Palavras-chave: Rural povery; Soil degradation; Slash-and-burn; Land-use model; Liberalization; Mexico; Environmental Economics and Policy; International Relations/Trade; Q12; Q23; D13; I3.
Ano: 2006
URL: http://purl.umn.edu/7992

Influence of field slope and coffee plantation age on the physical properties of a red-yellow Latosol
Provedor de dados: 90
Autores: Iori,Piero; Dias Junior,Moacir de Souza; Ajayi,Ayodele Ebenezer; Guimarães,Paulo Tácito Gontijo; Abreu Júnior,Áureo Aparecido.
In modern agriculture, several factors cause changes in the soil physical properties. The time of establishment of a crop (plantation age) and the slope are examples of factors that moderate the impact of mechanized operations on the soil structure. The objective of this study was to analyze the effect of machinery traffic on the physical properties of a Red-Yellow Latosol under coffee plantations with different ages (2, 7, 18, and 33 years) and slope positions (3, 9 and 15 %). Samples were collected from three positions between coffee rows (lower wheel track, inter-row and upper wheel track) and at two depths (surface layer and sub-surface). Changes in the total porosity, macroporosity, microporosity, organic matter, bulk density, and aggregate stability...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural traffic; Coffea arabica L.; Soil degradation; Aggregate stability.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000100010

The costs of soil erosion
Provedor de dados: 90
Autores: Telles,Tiago Santos; Guimarães,Maria de Fátima; Dechen,Sonia Carmela Falci.
The aim of this study was a survey of the estimated costs of soil erosion, an issue of fundamental importance in view of the current worldwide discussions on sustainability. A list was drawn up of research papers on erosion (on-site and off-site effects) and their respective costs. The estimates indicate the amount of resources spent in the process of soil degradation, raising a general awareness of the need for soil conservation. On-site costs affect the production units directly, while off-site costs create a burden borne by the environment, economy and society. In addition, estimating the costs of soil erosion should be effective to alert the agricultural producers, society and government for the need for measures that can be implemented to bring...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil degradation; On-site and off-site losses; Sustainable development.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000200001

Physical quality of an oxisol under different uses
Provedor de dados: 90
Autores: Mota,Francisco Ocian Bastos; Ness,Ricardo Luiz Lange; Mota,Jaedson Cláudio Anunciato; Clemente,Celso Augusto; Sousa,Sebastião Cavalcante.
The use of a soil induces changes in the physical properties according to the management, tillage intensity and type of crop. The objective of this work was to measure the alterations of some of the soil physical properties and evaluate the physical quality by the S index, an indicator proposed by Dexter (2004), comparing the land uses: eucalyptus plantations at different ages, grazing pasture, annual crops, and an area of preserved secondary vegetation with an area of preserved native forest (National Forest Araripe - NFA) as control. The study was carried out on an Oxisol on the Fazenda Redenção, in Jardim, State of Ceará, Brazil. The experiment was arranged in a completely randomized design with seven treatments and three replications in the layers...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Land use; Soil physical properties; S index; Soil degradation; Araripe Plateau - Brazil.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000600017

Visual Evaluation of the Soil Structure under Different Management Systems in Lowlands in Southern Brazil
Provedor de dados: 90
Autores: Tuchtenhagen,Ivana Kruger; Lima,Cláudia Liane Rodrigues de; Bamberg,Adilson Luís; Guimarães,Rachel Muylaert Locks; Mansonia,Pulido-Moncada.
ABSTRACT The “Visual Evaluation of Soil Structure” (VESS) is a method used primarily to evaluate the soil structural quality of Oxisols in Brazil and secondly for more specific research, consultancy, and teaching purposes. Since the methodology was never applied and compared with laboratory evaluations of physical properties of hydromorphic soils of the Pampa biome in the south of Brazil, this study evaluated the use of VESS as a visual indicator of the structure quality of a typic eutrophic Albaqualf soil under native grassland, crop-livestock integration, no-tillage, and conventional management systems. Experimental areas with these different management systems were subjected to visual (VESS) and laboratory evaluation of the soil structure. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil degradation; Bulk density; Tensile strength; No-tillage; Conventional tillage.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100412

Recovery of soil physical properties by green manure, liming, gypsum and pasture and spontaneous native species¹
Provedor de dados: 90
Autores: Santos Batista Bonini,Carolina dos; Alves,Marlene Cristina.
Inadequate usage can degrade natural resources, particularly soils. More attention has been paid to practices aiming at the recovery of degraded soils in the last years, e.g, the use of organic fertilizers, liming and introduction of species adapted to adverse conditions. The purpose of this study was therefore to investigate the recovery of physical properties of a Red Latosol (Oxisol) degraded by the construction of a hydroelectric power station. In the study area, a soil layer about 8m thick had been withdrawn by heavy machines leading not only to soil compaction, but resulting in high-degree degradation. The experiment was arranged in a completely randomized design with nine treatments and four replications. The treatments consisted of: 1- soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil bulk density; Total porosity; Soil degradation; Soil quality.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400034

Changes in attributes of soils subjected to fallow in desertification hotspot
Provedor de dados: 124
Autores: Ferreira,Mirele Paula da Silva; Artur,Adriana Guirado; Queiroz,Hermano Melo; Romero,Ricardo Espíndola; Costa,Mirian Cristina Gomes.
ABSTRACT  Soils in semi-arid regions have been degraded by overgrazing, which reduces the production capacity and, in certain situations, leads to desertification. An alternative to recover degraded areas is the fallow period, which works through the resilience of the soil itself, increasing the supply of organic matter and improving soil physical properties. Thus, the objective of this study was to test the hypothesis that 14-year grazing exclusion improves soil physical and chemical attributes in degraded areas under desertification. The study was conducted in Irauçuba, Ceará State, Brazil. The experimental design was completely randomized, in a 4 x 2 factorial scheme corresponding to four areas and two managements (overgrazing and fallow), with four...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil organic carbon; Soil degradation; Semi-arid region; Overgrazing.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000100022

Sediment loss in semiarid small watershed due to the land use
Provedor de dados: 124
Autores: Rodrigues,Joseilson Oliveira; Andrade,Eunice Maia de; Palácio,Helba Araújo Queiroz; Mendonça,Luiz Alberto Ribeiro; Santos,Júlio César Neves dos.
The aim of this study was to evaluate and compare the sedimentological behavior in two small rural watersheds in the semiarid Northeast of Brazil, examining the influence of human activity on the sediment yields. The studied area is sited in the Alto Jaguaribe basin, more precisely in the Iguatu County, Ceará State. The experimental area was composed of two small watersheds denominated B1 and B2. In watershed B1 a treatment (thinning) was applied, eliminating the plant species with diameters lower than 10 cm. The results showed that the Caatinga clearing practice did have an influence in changing the sediment yield during the first events. It was also found that the magnitude of previous events contributed to an increase in the sediment yields by the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caatinga; Soil degradation; Soil erosion; Ephemeral creek.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000300010

Multiperspective analysis of erosion tolerance
Provedor de dados: 63
Autores: Sparovek,Gerd; De Maria,Isabella Clerici.
Erosion tolerance is the most multidisciplinary field of soil erosion research. Scientists have shown lack in ability to adequately analyze the huge list of variables that influence soil loss tolerance definitions. For these the perspectives of erosion made by farmers, environmentalists, society and politicians have to be considered simultaneously. Partial and biased definitions of erosion tolerance may explain not only the polemic nature of the currently suggested values but also, in part, the nonadoption of the desired levels of erosion control. To move towards a solution, considerable changes would have to occur on how this topic is investigated, especially among scientists, who would have to change methods and strategies and extend the perspective of...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Soil erosion; Soil degradation; Land use planning.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200029

Valuation and assessment of soil erosion costs
Provedor de dados: 63
Autores: Telles,Tiago Santos; Dechen,Sonia Carmela Falci; Souza,Luiz Gustavo Antonio de; Guimarães,Maria de Fátima.
Soil is an essential natural resource for humans and an important part of the environment. However, soil is often used and managed inappropriately, causing its erosion and degradation, with concomitantly negative social, political and economic impacts. This study aimed to discuss sustainable development; and losses and problems caused by soil erosion, and to suggest a model for assessing erosion costs. The relevance of economic models for costing soil erosion is stressed. Based on an economic theory, it presents a procedure for assessing economic costs of soil erosion, centered on the on-site and off-site costs that are generated. The physical processes of soil erosion are described and their economic effects reviewed, drawing on theoretical and empirical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil degradation; Soil loss; Soil conservation; Sustainable development.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000300010

Fertility and acidity status of latossolos (oxisols) under pasture in the Brazilian Cerrado
Provedor de dados: 42
Autores: Vendrame,Pedro R.S.; Brito,Osmar R.; Guimarães,Maria F.; Martins,Éder S.; Becquer,Thierry.
The Cerrado region, with over 50 million hectares of cultivated pasture, provides 55% of Brazilian beef production. Previous investigations have shown that about 70-80% of this pasture is affected by some kind of degradation, leading to low productivity. However, until now, few surveys have been carried out on a regional scale. The aim of the present work is both to assess the fertility and acidity levels of Cerrado soils under pasture and compare the variability of the soils characteristics on a regional scale. Two soil depths were sampled in different places within the studied area: (1) a surface horizon (0.0-0.2 m) in order to evaluate its fertility and acidity status for pasture, and (2) a subsurface horizon (0.6-0.8 m), used for classification. Most...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cation exchange capacity; Exchangeable aluminum; Phosphorus availability; Soil degradation; Total carbon.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000400026

Potentialities and limitations of agricultural use in soils of semi-arid region of the state of Bahia
Provedor de dados: 42
Autores: QUEIROZ,ALEXSANDRA F. DE; SALVIANO,ALESSANDRA M.; CUNHA,TONY J.F. DA; OLSZEVSKI,NELCI; SOUZA JÚNIOR,VALDOMIRO S. DE; OLIVEIRA NETO,MANOEL B. DE.
Abstract The objective of this study was to evaluate the potentialities and limitations of the agricultural use of representative classes of semi-arid regions of the state of Bahia, based on the pedological and evaluation of their soil characteristics. Five areas were selected where trenches were opened to collect samples for the analyses: Eutric Haplustept which presents vulnerability to physical and chemical degradation due to poor drainage with risks of erosion, waterlogging, salinization and compaction but having good natural fertility; Abrupt Kandiustalf with high vulnerability to physical degradation due to the presence of gravel and pebbles which may limit the development of deep rooting plants and mechanization but also with good natural fertility;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sustainable; Soil quality; Physical attributes; Use limitations; Soil degradation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703373

Past and present land use influences on tropical riparian zones: an isotopic assessment with implications for riparian forest width determination
Provedor de dados: 49
Autores: Salemi,Luiz Felippe; Lins,Silvia Rafaela Machado; Ravagnani,Elizabethe de Campos; Magioli,Marcelo; Martinez,Melissa Gaste; Guerra,Fernando; Vidas,Natassia Bonini; Fransozi,Aline; Ferraz,Silvio Frosini de Barros; Martinelli,Luiz Antonio.
Abstract In this article, by using carbon stable isotopes, we assessed the past and present land use influences that riparian areas are subject within agricultural landscapes. Emphasis is given to the understanding of the effects of the 2012 Brazilian Forest Act on such areas. We selected five riparian areas within a highly C4 dominated agricultural landscape. Three of them had 30 meters native riparian forest buffer (NRFB) and two of them had 8 meter and no NRFB. We used three 100 meter-transects located 5, 15 and 30 meters relative to stream channel to obtain soil samples (0 - 10 cm). All riparian areas presented soil carbon isotopic signatures that are not C3 (native forests) irrespective of having or not 30 meters NRFB. Two cases presenting less than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Watershed; Soil degradation; Organic matter; Sediment; Carbon cycling.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000200210

Mucorales from the semiarid of Pernambuco, Brazil
Provedor de dados: 58
Autores: Santiago,André Luiz Cabral Monteiro de Azevedo; Santos,Paulo Jorge Parreira dos; Maia,Leonor Costa.
Nineteen taxa of Mucorales, belonging to Absidi, Apophysomyces, Cunninghamella, Fennellomyces, Lichtheimi, Mucor, Mycotypha, Rhizopus and Syncephalastrum were isolated from 36 composite soil samples in three semiarid areas in the State of Pernambuco (Triunfo, Cabrobó and Belém de São Francisco), Northeast Brazil, which are characterized by Caatinga vegetation. Triunfo is preserved, whereas Cabroró and Belém de São Francisco are experiencing low and severe desertification processes, respectively. Mucorales were isolated in Petri dishes in triplicate from 5 mg samples of soil placed on the surface of wheat germ agar plus chloramphenicol and Cercobin [Dimethyl 4,49-(103 phenylene) bis (3-thioallophanate)] medium. The plates were left on a bench at room...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity; Caatinga; Mucoromycotina; Soil degradation; Taxonomy.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000100044

Variability of Soil Types in Wetland Meadows in the South of the Chilean Patagonia
Provedor de dados: 117
Autores: Filipová,Ladislava; Hédl,Radim; Covacevich C.,Nilo.
The wetland meadows and pastures (vegas) of the agricultural zone of the Magallanes Region and the Chilean Patagonia are productive and intensively exploited ecosystems. However, there is scarce data about the typology and the physical and chemical properties of the soils that determine the agricultural potential of vegas sites. Sampling of the main horizons of 47 soil profiles was conducted throughout the area. The profiles were described in the field and consequently classified according to the soil typology system of the WRB (IUSS Working Group WRB, 2006). Analyses of bulk and particle densities, capillary water capacity, pH (H2O), pH (CaCl2), texture, organic material, C:N ratio, electrical conductivity, effective cation exchange capacity, N, P,...
Tipo: Journal article
Palavras-chave: Histosols; Fluvisols; Peat; Soil properties; Salinization; Soil degradation.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000200010

SPATIAL AND TEMPORAL MODELING OF WATER EROSION IN DYSTROPHIC RED LATOSOL (OXISOL) USED FOR FARMING AND CATTLE RAISING ACTIVITIES IN A SUB-BASIN IN THE SOUTH OF MINAS GERAIS
Provedor de dados: 64
Autores: Olivetti,Diogo; Mincato,Ronaldo Luiz; Ayer,Joaquim Ernesto Bernardes; Silva,Marx Leandro Naves; Curi,Nilton.
Water erosion is one of the most important soil degradation processes and it can be intensified by land use and vegetal covering changes. Thus, water erosion modeling studies associated to multi temporal analyses of land use are effective in assessing how changes in land cover affects sediment yield. Therefore, considering the modifications in the land use from 1986 to 2011, the aim of this study ranged to estimate water erosion rates and compare them to the soil loss tolerance (SLT) limit in the Latosols (Oxisols) at Ribeirão Caçús sub-basin, in the South of Minas Gerais State, Southeast Brazil, by means of the Revised Universal Soil Loss Equation (RUSLE) in association with the geographic information system (GIS), and geostatistical techniques. So, for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Land use changes; RUSLE; Soil loss prediction; Soil degradation.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000100058

Establishment of homogeneous zones in a soil of alluvial origin
Provedor de dados: 64
Autores: Jaramillo-Barrios,Camilo Ignacio; Ortiz-Rico,Andrés Felipe; Carrillo,Gustavo Alfonso Araujo; Varón-Ramírez,Viviana Marcela.
ABSTRACT Soils have the ability to maintain plant growth and biological activity due to their physical and chemical properties. The aim of this study was to observe the spatial distribution of some chemical properties of the soil, such as pH, organic matter (OM), electrical conductivity (EC), effective cation exchange capacity (ECEC), sulfur (S) and aluminum (Al) content and to establish zones with homogeneous chemical characteristics using the MULTISPATI-PCA technique and the fuzzy c-means algorithm. The study area was located in the Tundama and Sugamuxi Valleys (Boyacá, Colombia) with an area of ​​8,017 ha. Chemical properties such as pH, OM, EC, S, Al, and ECEC were indicators of the chemical degradation of these soils. Four homogeneous zones were...
Palavras-chave: Geostatistics; Semivariogram; Soil degradation; Multispati-PCA; Spatial distribution.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100216

Management zones determination based on physical properties of the soil
Provedor de dados: 64
Autores: Varón-Ramírez,Viviana Marcela; Camacho-Tamayo,Jesús Hernán; González-Nivia,Janeth.
ABSTRACT The physical characteristics of the soil are defined through the interaction between its properties, and they, in turn, can indicate its physical quality. The study area is located in the Centro Agropecuário Marengo (Marengo Agricultural Center), with an extension of 94.5 ha, subdivided into 17 plots. The objective of this research was to study characteristics such as water storage capacity, structure, consistency, and soil compaction in the two surface horizons (H1 and H2), in order to define management zones through the soil index. Properties such as soil penetration resistance were an indicator of soil degradation, with values higher than 2 MPa in 13 plots. The total porosity exhibited medium or low values in the H1 and H2 horizons, with a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil degradation; Soil compaction; Soil water storage; Soil index.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000300248