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	Provedor de dados Rev. Bras. Ciênc. Solo (3) Agrociencia (1) Autor Yang,Dejun (4) Zhang,Kefeng (4) Lei,Shaogang (3) Bian,Zhengfu (2) Xiong,Jibing (2) Zhang,Tuqiao (1) Mais... Palavra-chave Soil water content (2) Agro-hydrological model (1) Agro-hydrological simulation (1) Evaporation (1) FEM (1) Friability (1) Hard-setting (1) Infiltration (1) Integrated Richards Equation (1) Root length distribution (1) Runoff (1) S index (1) Soil water retention curve (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Info:eu-repo/semantics/other (1) Ano 2017 (1) 2016 (1) 2015 (2) País Brazil (3) Mexico (1) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Extending the integrated Richards Equation method to new boundary conditions: model description and validation Agrociencia Yang,Dejun; Zhang,Tuqiao; Zhang,Kefeng; Lei,Shaogang. There is a need for developing an accurate and simple method, which can be widely used in agro-hydrological models. The Integrated Richards Equation method is a good and simple method to simulate cyclic movement of water in the soil-atmosphere system. However, this method still has some unsolved problems and it is needed for further development if used in agro-hydrological simulation. In this study, the Integrated Richards Equation method was further developed for the agro-hydrological simulation by introducing the commonly used soil hydraulic functions, top and lower boundary conditions. Infiltration numerical experiments and a lab evaporation experiment were used for the validation of the model's capabilities of modelling infiltration and evaporation,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Evaporation; Agro-hydrological simulation; Infiltration; Integrated Richards Equation; Runoff; Soil water content. Ano: 2015 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952015000700002 Modeling Root Growth, Crop Growth and N Uptake of Winter Wheat Based on SWMS_2D: Model and Validation Rev. Bras. Ciênc. Solo Yang,Dejun; Bian,Zhengfu; Zhang,Kefeng; Xiong,Jibing; Lei,Shaogang. ABSTRACT Simulations for root growth, crop growth, and N uptake in agro-hydrological models are of significant concern to researchers. SWMS_2D is one of the most widely used physical hydrologically related models. This model solves equations that govern soil-water movement by the finite element method, and has a public access source code. Incorporating key agricultural components into the SWMS_2D model is of practical importance, especially for modeling some critical cereal crops such as winter wheat. We added root growth, crop growth, and N uptake modules into SWMS_2D. The root growth model had two sub-models, one for root penetration and the other for root length distribution. The crop growth model used was adapted from EU-ROTATE_N, linked to the N... Tipo: Info:eu-repo/semantics/article Palavras-chave: Agro-hydrological model; FEM; Root length distribution; Soil water content. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100520 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 Response to De Jong Van Lier's comments on “Quantitative assessment of soil physical quality in northern China based on S-theory” [Rev Bras Cienc Solo. 2015;39:1311-21] Rev. Bras. Ciênc. Solo Yang,Dejun; Zhang,Kefeng. Tipo: Info:eu-repo/semantics/other Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100902 Registros recuperados: 4 Primeira ... 1 ... Última

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