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| Registros recuperados: 18 | |
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| Beniaich,Adnane; Silva,Marx Leandro Naves; Guimarães,Danielle Vieira; Bispo,Diêgo Faustolo Alves; Avanzi,Junior Cesar; Curi,Nilton; Pio,Rafael; Dondeyne,Stefaan. |
| ABSTRACT In the tropics, water erosion is one of the most important factors leading to the degradation and deterioration of agricultural land. Olive orchards have a low canopy coverage, especially during the first years after planting, due to the low density of olive trees. Given the fast expansion of olive orchards in Brazil, this study aimed to evaluate the effect of cover vegetation on soil and water losses under natural rainfall. In addition, it was assessed the crop performance and the vegetation cover index in different management systems in olive orchards. The study was carried out in soil erosion plots, where water and sediment were sampled and measured over two crops season, under the following treatments: in the first season, bare soil with olive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil conservation; Soil loss; Land degradation; Runoff; Olive cultivation. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832020000100503 |
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| Otim, Daniel; Smithers, Jeff; Senzanje, Aidan; van Antwerpen, Rianto; Thornton-Dibb, Sean LC. |
| Sugarcane in South Africa is grown on wide-ranging soils, sometimes in non-ideal climates and on steep topographies where soils are vulnerable to erosion. Sugarcane fields are protected against erosion through, inter alia, the use of engineered waterways, contour banks and spill-over roads. A comparison of design norms in the National Soil Conservation Manual and norms used in the sugar industry clearly shows discrepancies that need to be investigated. Furthermore, the sugar industry design nomograph was developed based on an unsustainable soil loss limit, does not include any regional variations of climate and the impact on soil erosion and runoff and does not include vulnerability during break cropping. The aim of this research was to develop and assess... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: ACRU; Design norm; Soil and water conservation; Soil loss; Sugarcane; South Africa. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6047 |
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| Huerta Olague, José de Jesús. |
| Se avaluó el efecto de la cobertura vegetal y de las raíces, de maíz (Zea mays L.), frijol (Phaseolus vulgaris L.), calabacita (Cucurbita pepo L.) y avena (Avena sativa L.), sobre el escurrimiento superficial y la perdida del suelo. El trabajo se realizo en un campo experimental de la Universidad Autónoma Chapingo y se utilizaron 8 tratamientos, 2 para cada cultivo (4 fueros subparcelas con cobertura vegetal y 4 subparcelas sin cobertura y solo con raíces, mismas que resultaron de cortar al ras del suelo los cultivos estudiados. La cobertura vegetal se midió en porcentajes y el sistema radical en densidad longitudinal de raíces (DLR). Se aplicó lluvia simulada a los 15, 30, 50 y 65 días de desarrollo sobre lotes de escurrimiento de 1 metro cuadrado y 10%... |
| Tipo: Tesis |
Palavras-chave: Escurrimiento superficial; Pérdida de suelo; Cobertura vegetal; Raíces; Maestría; Hidrociencias; Surface runoff; Soil loss; Vegetative cover; Roots. |
| Ano: 2007 |
URL: http://hdl.handle.net/10521/1271 |
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| Back,Álvaro J.; Pola,Augusto C.; Ladwig,Nilzo I.; Schwalm,Hugo. |
| ABSTRACT This study aimed to determine the rainfall erosivity index in the Valley of Rio do Peixe, in the state of Santa Catarina, Brazil. The data series of three rain gauge stations in the cities of Campos Novos, Videira, and Caçador were used to determine the rainfall erosivity based on the EI30 index and to adjust the equations in order to estimate the EI30 value from the rainfall coefficient. On average, it was observed that erosive rains represents 81.4-88.5% of the annual precipitation. The adjusted equations can be used to estimate rainfall erosivity in locations with only rainfall data. The regional equation specified for the erosivity estimation is EI30 = 74.23 Rc0.8087. The R factor is 8,704.8; 7,340.8; and 6,387.1 MJ mm ha-1 h-1 year-1 for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil loss; Soil conservation; Water erosion; Precipitation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001100774 |
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| GALDINO, S.; ARAUJO, L. S. de; SILVA, G. B. S. da; NOGUEIRA, S. F.; PEREIRA, K. C.. |
| A degradação das pastagens é um dos maiores problemas enfrentados pela pecuária brasileira, e constitui atualmente uma questão prioritária do governo federal. A partir da estimativa geoespacializada da perda de solo atual e para encontrar alternativas de uso das terras em áreas de pastagens localizadas no Município de Pindamonhangaba, SP, foi avaliado o efeito do manejo e de práticas conservacionistas do solo sobre a erosão hídrica. Para a obtenção da perda de solo, foram considerados: erosividade das chuvas, erodibilidade dos solos, efeito do comprimento e grau de declive das encostas, uso do solo e manejo da cobertura vegetal, e implementação ou não de terraceamento. Também foi avaliado o efeito da transformação de áreas declivosas em áreas de mata. A... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Perda de solo; USLE; Soil loss; RUSLE.; Sensoriamento Remoto; Sistema de Informação Geográfica.; Geographic information systems; Remote sensing.. |
| Ano: 2014 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1016756 |
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| Carvalho,Daniel Fonseca de; Durigon,Valdemir Lucio; Antunes,Mauro Antonio Homem; Almeida,Wilk Sampaio de; Oliveira,Paulo Tarso Sanches de. |
| The objective of this work was to evaluate the seasonal variation of soil cover and rainfall erosivity, and their influences on the revised universal soil loss equation (Rusle), in order to estimate watershed soil losses in a temporal scale. Twenty-two TM Landsat 5 images from 1986 to 2009 were used to estimate soil use and management factor (C factor). A corresponding rainfall erosivity factor (R factor) was considered for each image, and the other factors were obtained using the standard Rusle method. Estimated soil losses were grouped into classes and ranged from 0.13 Mg ha-1 on May 24, 2009 (dry season) to 62.0 Mg ha-1 on March 11, 2007 (rainy season). In these dates, maximum losses in the watershed were 2.2 and 781.5 Mg ha-1 , respectively. Mean... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: C factor; Rainfall erosivity; Remote sensing; Soil loss; Vegetation index. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000300215 |
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| Rocha,Gustavo Casoni da; Sparovek,Gerd. |
| ABSTRACT: Sugarcane covers 10.6 Mha of Brazilian agricultural land (13 % of all cropland), mainly in the south-central region. In tropical climate conditions, the physiological characteristics of sugarcane allow a wide range of management systems with contrasting soil erosion outcomes. Models can assess these differences and the Universal Soil Loss Equation (USLE) based models are the most frequently used. The cover-management factor (C Factor) is the USLE input variable that represents the changes in soil cover and management. We collected, compared, and evaluated sugarcane C Factor values reported in technical and scientific literature to support modelers and soil scientists on the adequate choice of these values. We analyzed references reporting primary... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bibliometric research; Modeling; Soil loss. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000701801 |
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| Cassol,Elemar Antonino; Silva,Tiago Stumpf da; Eltz,Flávio Luiz Foletto; Levien,Renato. |
| ABSTRACT: Erodibility represents the intrinsic susceptibility of the soil to the erosion process, represented by the K factor in the Universal Soil Loss Equation (USLE). In Brazil, there are few field experiments determined with a series larger than ten years of data, which are the most reliable for quantifying the K factor. The aim of this study was to determine the K factor of the USLE by the direct method, relating soil losses determined in the field under standard conditions to erosivity of rains, and by the analytic method, applying the Wischmeier nomograph. The data on soil loss by water erosion were obtained in a field experiment under natural rainfall conditions from 1976 to 1989 in an Ultisol at the Agronomic Experimental Station in Eldorado do... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water erosion; Soil loss; Soil properties; Erosion modeling; Surface runoff. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100518 |
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| Bertol,Ildegardis; Barbosa,Fabrício Tondello; Mafra,Álvaro Luiz; Flores,Murilo Córdova. |
| The action of rain and surface runoff together are the active agents of water erosion, and further influences are the soil type, terrain, soil cover, soil management, and conservation practices. Soil water erosion is low in the no-tillage management system, being influenced by the amount and form of lime and fertilizer application to the soil, among other factors. The aim was to evaluate the effect of the form of liming, the quantity and management of fertilizer application on the soil and water losses by erosion under natural rainfall. The study was carried out between 2003 and 2013 on a Humic Dystrupept soil, with the following treatments: T1 - cultivation with liming and corrective fertilizer incorporated into the soil in the first year, and with 100 %... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Crop mass; Water loss; Soil loss; Natural rainfall. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000600026 |
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| 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 |
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| Carvalho,Daniel F. de; Eduardo,Eliete N.; Almeida,Wilk S. de; Santos,Lucas A. F.; Alves Sobrinho,Teodorico. |
| ABSTRACTThis study evaluated soil and water losses, soil water infiltration and infiltration rate models in soil tillage systems and corn (Zea mays, L.) development stages under simulated rainfall. The treatments were: cultivation along contour lines, cultivation down the slope and exposed soil. Soil losses and infiltration in each treatment were quantified for rains applied using a portable simulator, at 0, 30, 60 and 75 days after planting. Infiltration rates were estimated using the models of Kostiakov-Lewis, Horton and Philip. Based on the obtained results, the combination of effects between soil tillage system and corn development stages reduces soil and water losses. The contour tillage system promoted improvements in soil physical properties,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil loss; Infiltration rate; Soil tillage; Rainfall simulator. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001101072 |
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| Bagio,Bárbara; Bertol,Ildegardis; Wolschick,Neuro Hilton; Schneiders,Danieli; Santos,Maria Aparecida do Nascimento dos. |
| ABSTRACT Water erosion degrades the soil and contaminates the environment, and one influential factor on erosion is slope length. The aim of this study was to quantify losses of soil (SL) and water (WL) in a Humic Cambisol in a field experiment under natural rainfall conditions from July 4, 2014 to June 18, 2015 in individual events of 41 erosive rains in the Southern Plateau of Santa Catarina and to estimate soil losses through the USLE and RUSLE models. The treatments consisted of slope lengths of 11, 22, 33, and 44 m, with an average degree of slope of 8 %, on bare and uncropped soil that had been cultivated with corn prior to the study. At the end of the corn cycle, the stalk residue was removed from the surface, leaving the roots of the crop in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil loss; Water loss; USLE; RUSLE. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100505 |
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| Mendes Júnior,Henrique; Tavares,André Silva; Reis dos Santos Júnior,Walbert; Silva,Marx Leandro Naves; Santos,Breno Régis; Mincato,Ronaldo Luiz. |
| ABSTRACT Water erosion is one of the main environmental impacts of land use. When soil and water losses occur, nutrients essential for the growth and maintenance of plants are removed, with harmful outcomes on the sustainability of agriculture and the environment. In addition, they lead to other deleterious effects, such as sedimentation and eutrophication of water bodies. Estimation of soil losses due to water erosion in sub-basins is essential for prediction of soil degradation, especially in areas of semi-intensive cultivation, such as coffee fields. Thus, the aim of this study was to estimate soil losses in relation to the limit of soil loss tolerance in Oxisols (Latossolos Vermelhos Distróficos) under coffee cultivation. This study was conducted from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil loss; RUSLE; Soil loss tolerance. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100521 |
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| Oliveira,Anna Hoffmann; Silva,Marx Leandro Naves; Curi,Nilton; Avanzi,Junior Cesar; Klinke Neto,Gustavo; Araújo,Elias Frank. |
| The constant increasing of eucalyptus forest areas in Brazil requires an accurate monitoring of water erosion. The present study aimed to evaluate soil, nutrients and organic carbon losses occasioned by water erosion in eucalyptus planted forests (EPF) at different development stages (2, 3 and 7 years old). Soil erosion sediments were measured and sampled from standard erosion plots installed on Red Argisol-RA (Ultisol) and Haplic Cambisol-HC (Inceptisol). Soil loss decreased as the age of plants increased; at the beginning of plant development, the canopy barely covered the soil surface, exposing the soil to higher erosion at young EPF plantations. Furrow planting system was used in the Red Argisol area and caused higher soil losses (1.1 to 6.2 Mg ha-1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil loss; Afforestation; Conservation system. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000200007 |
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| Rieger,Fernando Alexandre; Zolin,Cornélio Alberto; Paulino,Janaina; Souza,Adilson Pacheco de; Matos,Eduardo da Silva; Magalhães,Ciro Augusto de Souza; Farias Neto,Austeclínio Lopes de. |
| ABSTRACT Water erosion is one of the main factors driving soil degradation, which has large economic and environmental impacts. Agricultural production systems that are able to provide soil and water conservation are of crucial importance in achieving more sustainable use of natural resources, such as soil and water. The aim of this study was to evaluate soil and water losses in different integrated production systems under natural rainfall. Experimental plots under six different land use and cover systems were established in an experimental field of Embrapa Agrossilvipastoril in Sinop, state of Mato Grosso, Brazil, in a Latossolo Vermelho-Amarelo Distrófico (Udox) with clayey texture. The treatments consisted of perennial pasture (PAS), crop-forest... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Surface runoff; Natural rain; Soil loss; Water loss; Land slope. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100513 |
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| Engel,Fernando Luis; Bertol,Ildegardis; Mafra,Álvaro Luiz; Cogo,Neroli Pedro. |
| Soil management influences soil cover by crop residues and plant canopy, affecting water erosion. The objective of this research was to quantify water and soil losses by water erosion under different soil tillage systems applied on a typical aluminic Hapludox soil, in an experiment carried out from April 2003 to May 2004, in the Santa Catarina highland region, Lages, southern Brazil. Simulated rainfall was applied during five soybean cropstages, at the constant intensity of 64.0 mm h-1. Treatments were replicated twice and consisted of: i) conventional tillage on bare soil - control treatment (CTBS), ii) conventional tillage on cultivated soil (CTCS), iii) no-tillage on non tilled soil with burned crop residue (NTRB), iv) no-tillage in non tilled soil with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil cover; Soil loss; Water loss; Soybean crop. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000200013 |
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| Registros recuperados: 18 | |
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