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| Medeiros,Grasiela de Oliveira Rodrigues; Giarolla,Angelica; Sampaio,Gilvan; Marinho,Mara de Andrade. |
| ABSTRACT: The soil is a key component of the Earth System, and is currently under high pressure, due to the increasing global demands for food, energy and fiber. Moreover, the management of agricultural systems is often inadequate and ignores the agricultural suitability of lands, and particularly the vulnerability of soils. This paper demonstrates the application of the concept of the Soil Lifetime Index (SLtI) for the entire state of São Paulo, at a spatial resolution of 30 m. The SLtI methodology represents a tolerance criterion and a diagnostic tool to assess the level of soil degradation by water erosion, based on estimated soil loss rates and on an average soil renewal rate. Two approaches were applied to determine: i) the remaining time (years)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil erosion modeling; Soil loss rates; Soil loss tolerance; USLE; GIS. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100552 |
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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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| Silva,Mayesse Aparecida da; Silva,Marx Leandro Naves; Curi,Nilton; Oliveira,Anna Hoffmann; Avanzi,Junior Cesar; Norton,Lloyd Darrell. |
| Eucalyptus plantations are normally found in vulnerable ecosystems such as steep slope, soil with low natural fertility and lands that were degraded by agriculture. The objective of this study was to obtain Universal Soil Loss Equation (USLE) factors and use them to estimate water erosion risk in regions with eucalyptus planted. The USLE factors were obtained in field plots under natural rainfall in the Rio Doce Basin, MG, Brazil, and the model applied to assess erosion risk using USLE in a Geographic Information System. The study area showed rainfall-runoff erosivity values from 10,721 to 10,642 MJ mm ha-1 h-1 yr-1. Some soils (Latosols) had very low erodibility values (2.0 x 10-4 and 1.0 x 10-4t h MJ-1 mm-1), the topographic factor ranged from 0.03 to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: USLE factors; Soil loss tolerance; Conservation practices; Forest management. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000200007 |
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