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| Registros recuperados: 37 | |
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| 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 |
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| 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 |
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| 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... |
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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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 37 | |
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