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	Provedor de dados Scientia Agricola (2) PAB (1) Rev. Bras. Ciênc. Solo (1) Autor Shao,Ming An (4) Reichardt,Klaus (3) Hu,Wei (2) Wang,Quan Jiu (2) Amer,Abdel-monem Mohamed (1) Fan,Jun (1) Omran,Wail (1) She,Dong Li (1) Timm,Luis Carlos (1) Zhao,Pei (1) Mais... Palavra-chave Agropastoral transition zone (1) Coefficient of variation (1) Community characteristics (1) Correlation length (1) Dam construction (1) Disc infiltrometer (1) Medicago sativa (1) Pressure head (1) Soil conservation (1) Soil erodibility (1) Soil physical properties (1) Soil texture (1) Soil water restoration (1) Spatial structure (1) Steep sloping land (1) Stratification (1) Surface soil moisture (1) Temporal stability (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2011 (1) 2009 (1) 2008 (2) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Effects of erosion and deposition on particle size distribution of deposited farmland soils on the chinese loess plateau Rev. Bras. Ciênc. Solo Zhao,Pei; Shao,Ming An; Omran,Wail; Amer,Abdel-monem Mohamed. Particle size distribution (PSD) in the soil profile is strongly related to erosion, deposition, and physical and chemical processes. Water cycling and plant growth are also affected by PSD. Material sedimented upstream of the dam constructions formed large areas of deposited farmland (DF) soils on the Chinese Loess Plateau (CLP), which has been the site of the most severe soil erosion in the world. Two DFs without tillage on the CLP were chosen to study the combined effect of erosion and check dams on PSD. Eighty-eight layers (each 10 cm thick) of filled deposited farmland (FDF) soils and 22 layers of silting deposited farmland (SDF) soils of each studied soil profile were collected and 932 soil samples were investigated using laser granulometry. The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil texture; Stratification; Soil erodibility; Dam construction; Soil conservation. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000600028 Soil water content temporal-spatial variability of the surface layer of a Loess Plateau hillside in China Scientia Agricola Hu,Wei; Shao,Ming An; Wang,Quan Jiu; Reichardt,Klaus. Surface soil moisture exhibits an important variability in terms of spatial and temporal domains, which may result in critical uncertainties for agricultural water management. The purposes of this study were (i) to characterize the temporal dynamics and stability of the spatial variability of the surface 0-6 cm soil water content θon a hill-slope; (ii) to investigate issues related to soil moisture conditions including dominating factors on soil moisture and to the estimation of the mean θ. During a period of more than one month θwas measured on thirteen days by Frequency Domain Reflectometry using a 10 x 10 m grid of measurement points covering a 60 x 280 m domain within a hill-slope of the Loess Plateau in China. Soil water content exhibited a moderate... Tipo: Info:eu-repo/semantics/article Palavras-chave: Surface soil moisture; Coefficient of variation; Correlation length; Temporal stability. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000300008 Spatial variability of soil hydraulic properties on a steep slope in the loess plateau of China Scientia Agricola Hu,Wei; Shao,Ming An; Wang,Quan Jiu; Fan,Jun; Reichardt,Klaus. The understanding of the structure of the spatial variability of soil surface hydraulic properties on steep slopes is important for modeling infiltration and runoff processes. The objective of this study was to investigate the spatial variability of these properties on a steep slope of the Loess Plateau in northwest China. A 9600 m² area was systematically sampled in a grid of 106 points spaced 10 m x 10 m. Hydraulic properties were determined with a disc infiltrometer under multiple pressure heads (-15, -9, -6, -3, 0 cm) at each sample point. Classical and geo-statistical methods were used for data analysis. The results indicated that the variation of Gardner's a and hydraulic conductivities at all applied pressure heads was moderate and the heterogeneity... Tipo: Info:eu-repo/semantics/article Palavras-chave: Disc infiltrometer; Steep sloping land; Pressure head; Spatial structure. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000300007 Temporal changes of an alfalfa succession and related soil physical properties on the Loess Plateau, China PAB She,Dong Li; Shao,Ming An; Timm,Luis Carlos; Reichardt,Klaus. The objective of this work was to investigate the relationship between changes in the plant community and changes in soil physical properties and water availability, during a succession from alfalfa (Medicago sativa L.) to natural vegetation on the Loess Plateau, China. Data from a succession sere spanning 32 years were collated, and vegetative indexes were compared to changes related to soil bulk density and soil water storage. The alfalfa yield increased for approximately 7 years, then it declined and the alfalfa was replaced by a natural community dominated by Stipa bungeana that began to thrive about 10 years after alfalfa seeding. Soil bulk density increased over time, but the deterioration of the alfalfa was mainly ascribed to a severe reduction in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Medicago sativa; Agropastoral transition zone; Community characteristics; Soil physical properties; Soil water restoration. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000200011 Registros recuperados: 4 Primeira ... 1 ... Última

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