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A hydropedological approach to a mountainous Clayey Humic Dystrudept in the Mantiqueira Range, southeastern Brazil Scientia Agricola
Pinto,Leandro Campos; Mello,Carlos Rogério de; Norton,Lloyd Darrell; Poggere,Giovana Clarice; Owens,Phillip Ray; Curi,Nilton.
ABSTRACT: The Mantiqueira Range region is one of the most important headwaters in southeastern Brazil. In this context, the relationship between pedology and hydrology has been debated and analyzed in recent years, contributing to the creation of a multidisciplinary science call hydropedology. Therefore, the aim of this study was to evaluate the hydropedological properties of a mountainous Clayey Humic Dystrudept in the Mantiqueira Range region, in the state of Minas Gerais, Brazil, comparing two land-uses, native forest and pasture. The hydraulic conductivity results demonstrated that native forest (MFO) has a strong influence on this parameter, offering conditions for movement of water in the soil that are more adequate in this profile than in pasture....
Tipo: Info:eu-repo/semantics/article Palavras-chave: S index; Saturated hydraulic conductivity; Soil pore size distribution; Soil erosion; Water quality.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000100060
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Evaluation of physical quality indices of a soil under a seasonal semideciduous forest Rev. Bras. Ciênc. Solo
Oliveira,Thalita Campos; Silva,Laura Fernanda Simões da; Cooper,Miguel.
The concept of soil quality is currently the subject of great discussion due to the interaction of soil with the environment (soil-plant-atmosphere) and practices of human intervention. However, concepts of soil quality relate quality to agricultural productivity, but assessment of soil quality in an agronomic context may be different from its assessment in natural areas. The aim of this study was to assess physical quality indices, the S index, soil aeration capacity (ACt/Pt), and water storage capacity (FC/Pt) of the soil from a permanent plot in the Caetetus Ecological Reserve (Galia, São Paulo, Brazil) under a seasonal semideciduous forest and compare them with the reference values for soil physical quality found in the literature. Water retention...
Tipo: Info:eu-repo/semantics/article Palavras-chave: S index; ACt/Pt; FC/Pt; Water retention curve.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200009
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Index of soil physical quality of hardsetting soils on the brazilian coast Rev. Bras. Ciênc. Solo
Lima,Herdjania Veras de; Silva,Álvaro Pires da; Giarola,Neyde Fabíola Balarezzo; Imhoff,Sílvia.
Many soils have a hard-setting behavior, also known as cohesive or "coesos". In such soils, the penetration resistance increases markedly when dry and decreases considerably when moist, creating serious limitations for plant emergence and growth. To evaluate the level of structure degradation in hard-setting soils with different texture classes and to create an index for assessing soil hardness levels in hard-setting soils, six soil representative profiles were selected in the field in various regions of Brazil. The following indices were tested: S, which measures soil physical quality, and H , which analyzes the degree of hardness and the effective stress in the soil during drying. Both indices were calculated using previously described functions based on...
Tipo: Info:eu-repo/semantics/other Palavras-chave: S index; Coastal tablelands; Soil consistency; Hardened horizons.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000600007
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Physical quality of an Oxisol after different periods of management systems Rev. Bras. Ciênc. Solo
Rossetti,Karina de Vares; Centurion,José Frederico; Sousa Neto,Eurico Lucas de.
Management systems may lead to a loss of soil physical quality as a result of removal of the plant cover and excessive agricultural mechanization. The hypothesis of this study was that the soil aggregate stability, bulk density, macro- and microporosity, and the S index and saturated hydraulic conductivity may be used as indicators of the soil physical quality. The aim was to study the effects of different periods and managements on the physical attributes of a medium-textured Red Oxisol under soybean and corn for two growing seasons, and determine which layers are most susceptible to variations. A completely randomized experimental design was used with split plots (five treatments and four layers), with four replications. The treatments in 2008/09...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aggregation; S index; Saturated hydraulic conductivity.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000600009
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Physical quality of an oxisol under different uses Rev. Bras. Ciênc. Solo
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
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Quantitative Assessment of Soil Physical Quality in Northern China Based on S-theory Rev. Bras. Ciênc. Solo
Yang,Dejun; Bian,Zhengfu; Zhang,Kefeng; Xiong,Jibing; Lei,Shaogang.
ABSTRACT Quantitative assessment of soil physical quality is of great importance for eco-environmental pollution and soil quality studies. In this paper, based on the S-theory, data from 16 collection sites in the Haihe River Basin in northern China were used, and the effects of soil particle size distribution and bulk density on three important indices of theS-theory were investigated on a regional scale. The relationships between unsaturated hydraulic conductivityKi at the inflection point and S values (S/hi) were also studied using two different types of fitting equations. The results showed that the polynomial equation was better than the linear equation for describing the relationships between -log Ki and -logS, and -log Kiand -log (S/hi)2; and clay...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Friability; Hard-setting; S index; Soil water retention curve.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000501311
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