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	Provedor de dados AgEcon (3) Autor Jones, Hezekiah (3) Wheelock, Gerald (2) Befecadu, Joseph (1) Johnson, Jermisha D. (1) Joseph, Barbara A. (1) Onianwa, Okwudili O. (1) Wambles, Don (1) Mais... Palavra-chave Agribusiness (1) Crop Production/Industries (1) Food Security and Poverty (1) GPFARM (1) Management unit (1) Nitrate leaching (1) Profitability (1) Mais... Tipo do documento Conference Paper or Presentation (2) Journal Article (1) Ano 2006 (1) 2003 (1) 2002 (1) País United States (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 66 Primeira ... 1 2 3 4 ... Última Transient Soil Surface Sealing and Infiltration Model for Bare Soil Under Droplet Impact. NWISRL King, B.A.; Bjorneberg, D.L.. The marked reduction in infiltration rate caused by formation of a soil surface seal due to water droplet impact on bare soil is a well known phenomenon but is rarely considered in infiltration models, especially under center pivot irrigation. Water application rates under center pivot irrigation commonly exceed infiltration rate, especially near the end of the system lateral. This can lead to off-site runoff and erosion, but more importantly results in field-scale non-uniform water infiltration that can substantially reduce water use efficiency of these irrigation systems. The objective of this study was to develop a sealing soil infiltration model that considers transient soil seal formation on a 30 min or less time scale and can potentially be... Tipo: Article Palavras-chave: Sprinkler irrigation; Infiltration; Soil. Ano: 2012 URL: http://eprints.nwisrl.ars.usda.gov/1460/1/1425.pdf Hydraulic resistance of soil surface seals in irrigated furrows NWISRL Segeren, Antonius G.; Trout, Thomas J.. Tipo: Article Palavras-chave: Infiltration; Soil; Mass Import - autoclassified (may be erroneous). Ano: 1991 URL: http://eprints.nwisrl.ars.usda.gov/557/1/748.pdf Earthworms cause furrow infiltration increase NWISRL Trout, Thomas J.; Kemper, W.D.; Johnson, G.S.. Tipo: Conference or Workshop Item Palavras-chave: Infiltration; Mass Import - autoclassified (may be erroneous). Ano: 1987 URL: http://eprints.nwisrl.ars.usda.gov/1040/1/613.pdf Sprinkler Irrigation Effects on Infiltration and Near-Surface Unsaturated Hydraulic Conductivity NWISRL Lehrsch, G.A.; Kincaid, D.C.. Sprinkler irrigation alters soil hydraulic properties both at and below the soil surface, yet its effects are not well characterized. We evaluated the effects of sprinkler irrigation on infiltration and near‐surface hydraulic conductivity (K) measured under tension in a poorly structured, recently roller‐harrowed Portneuf silt loam (Durinodic Xeric Haplocalcid). The experimental design was a randomized complete block with two treatments (pre‐ and post‐irrigation) and four replications. We used two half‐circle spray heads to apply 127 mm of water at 70 mm h-1 in one irrigation to duplicate 1 × 2 m plots. Unconfined (three‐dimensional) infiltration rates at steady‐state were measured at potentials of -55, -35, and -15mm of water before and about 10 days... Tipo: Article Palavras-chave: Infiltration; Sprinkler irrigation; Water. Ano: 2010 URL: http://eprints.nwisrl.ars.usda.gov/1371/1/1354.pdf Furrow Intake Rates and Water Management NWISRL Kemper, W.D.; Ruffing, B.J.; Bondurant, J.A.. Tipo: Article Palavras-chave: Infiltration; Water management; Mass Import - autoclassified (may be erroneous). Ano: 1982 URL: http://eprints.nwisrl.ars.usda.gov/385/1/481.pdf Sprinkler droplet energy effects on infiltration and near-surface, unsaturated hydraulic conductivity NWISRL Lehrsch, G.A.; Kincaid, D.C.. Tipo: Conference or Workshop Item Palavras-chave: Infiltration; Infiltration; Mass Import - autoclassified (may be erroneous). Ano: 2001 URL: http://eprints.nwisrl.ars.usda.gov/854/1/1030.pdf Crop and soil management to increase water infiltration into frozen soil NWISRL Pikul, J.L.; Aase, J.K.. Tipo: Conference or Workshop Item Palavras-chave: Infiltration; Soil; Mass Import - autoclassified (may be erroneous). Ano: 1997 URL: http://eprints.nwisrl.ars.usda.gov/913/1/939.pdf Influence of irrigation water properties on furrow infiltration: Temperature effects NWISRL Lentz, R.D.; Bjorneberg, D.L.. Tipo: Conference or Workshop Item Palavras-chave: Infiltration; Mass Import - autoclassified (may be erroneous). Ano: 2002 URL: http://eprints.nwisrl.ars.usda.gov/892/1/1066.pdf Determination of kinetic energy applied by center pivot sprinklers NWISRL King, B.A.; Bjorneberg, D.L.. Tipo: Conference or Workshop Item Palavras-chave: Center pivot; Infiltration; Sprinkler irrigation. Ano: 2009 URL: http://eprints.nwisrl.ars.usda.gov/1353/1/1330.pdf Dryland Management Alternatives and Research Needs for Alfisols in the Semi-Arid Tropics Open Agri S.A.. Palavras-chave: Tillage; Runoff; Sole cropping; Intercropping; Supplemental irrigation; Cropping systems; Genetic soil types; Crops; Infiltration; Minimum tillage. Ano: 1984 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4024 ALFISOLS in the Semi-Arid Tropics Open Agri Palavras-chave: Runoff; Tillage; Water harvesting; Pigeonpeas; Millets; Infiltration; Bunding; Intercropping; Zero tillage. Ano: 1987 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4047 Measuring soil processes in agricultural research / Laryea, K.B. Open Agri K.B.. Palavras-chave: Runoff; Soil water potential; Infiltration; Sampling; Tillage; Soil structure; Soil density; Soil sampling; Soil water. Ano: 1997 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4198 Accounting of agricultural and nonagricultural impacts of irrigation and drainage systems: A study of multifunctionality in rice. AgEcon Matsuno, Yutaka; Ko, H.S.; Tan, C.H.; Barker, Randolph; Levine, G.. Tipo: Working or Discussion Paper Palavras-chave: Irrigation farming; Drainage; Groundwater; Recharge; Rice; Paddy fields; Infiltration; Flood control; Agricultural and Food Policy; Crop Production/Industries; Farm Management; Resource /Energy Economics and Policy; Risk and Uncertainty. Ano: 2002 URL: http://purl.umn.edu/92702 Numerical analysis of the impact of charcoal production on soil hydrological behavior, runoff response and erosion susceptibility Rev. Bras. Ciênc. Solo Ayodele,Ajayi; Oguntunde,Philip; Joseph,Abiodun; Dias Junior,Moacir de Souza. The impact of charcoal production on soil hydraulic properties, runoff response and erosion susceptibility were studied in both field and simulation experiments. Core and composite samples, from 12 randomly selected sites within the catchment of Kotokosu were taken from the 0-10 cm layer of a charcoal site soil (CSS) and adjacent field soils (AFS). These samples were used to determine saturated hydraulic conductivity (Ksat), bulk density, total porosity, soil texture and color. Infiltration, surface albedo and soil surface temperature were also measured in both CSS and AFS. Measured properties were used as entries in a rainfall runoff simulation experiment on a smooth (5 % slope) plot of 25 x 25 m grids with 10 cm resolutions. Typical rainfall intensities... Tipo: Info:eu-repo/semantics/article Palavras-chave: Hydro-physical properties; Infiltration; Simulated runoff; Watershed hydrology. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000100015 Stabilization of soil hydraulic properties under a long term no-till system Rev. Bras. Ciênc. Solo Lozano,Luis Alberto; Germán Soracco,Carlos; Buda,Vicente S.; Sarli,Guillermo O.; Filgueira,Roberto Raúl. The area under the no-tillage system (NT) has been increasing over the last few years. Some authors indicate that stabilization of soil physical properties is reached after some years under NT while other authors debate this. The objective of this study was to determine the effect of the last crop in the rotation sequence (1st year: maize, 2nd year: soybean, 3rd year: wheat/soybean) on soil pore configuration and hydraulic properties in two different soils (site 1: loam, site 2: sandy loam) from the Argentinean Pampas region under long-term NT treatments in order to determine if stabilization of soil physical properties is reached apart from a specific time in the crop sequence. In addition, we compared two procedures for evaluating water-conducting... Tipo: Info:eu-repo/semantics/article Palavras-chave: Infiltration; Crop rotation; Water-conducting porosity; No tillage; Texture. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400024 Soil compaction and eucalyptus growth in response to forwarder traffic intensity and load Rev. Bras. Ciênc. Solo Silva,Sérgio Ricardo da; Barros,Nairam Félix de; Costa,Liovando Marciano da; Leite,Fernando Palha. During timber exploitation in forest stands harvesting machines pass repeatedly along the same track and can cause soil compaction, which leads to soil erosion and restricted tree root growth. The level of soil compaction depends on the number of passes and weight of the wood load. This paper aimed to evaluate soil compaction and eucalyptus growth as affected by the number of passes and wood load of a forwarder. The study was carried out in Santa Maria de Itabira county, Minas Gerais State - Brazil, on a seven-year-old eucalyptus stand planted on an Oxisol. The trees were felled by chainsaw and manually removed. Plots of 144 m² (four rows 12 m long in a 3 x 2 m spacing) were then marked off for the conduction of two trials. The first tested the traffic... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil bulk density; Water-stable aggregates; Soil penetration resistance; Porosity; Soil organic carbon; Infiltration. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000300002 Spatial and Temporal Potential Groundwater Recharge: the Case of the Doce River Basin, Brazil Rev. Bras. Ciênc. Solo Souza,Eliana de; Pontes,Lucas Machado; Fernandes Filho,Elpídio Inácio; Schaefer,Carlos Ernesto Goncalves Reynaud; Santos,Eliana Elizabet dos. ABSTRACT: Little is known about the groundwater recharge potential of weathered tropical catchments, where increasing water uptake is widespread to meet various water demands. This study aimed to estimate the volume of groundwater recharge of the Doce River Basin, Minas Gerais, Brazil. The BALSEQ model was applied to calculate the water balance over a period of two years (2007-2009). Evapotranspiration, runoff, and potential groundwater recharge (PGR) were calculated, using daily data on rainfall, potential evapotranspiration, and plant-available water. A soil survey was undertaken for all major soils occurring in the basin. Soils samples were used to determine hydraulic conductivity, bulk density, and water content at field capacity and at the permanent... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquifer; Infiltration; Potential recharge; Random Forests Model; Water balance. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100501 Model to support the evaluation of the impact of the use and management of the soil on the water balance - doi: 10.4025/actasciagron.v34i4.14733 Agronomy Mello, Eloy Lemos de; Universidade Estadual do Oeste do Paraná; Pruski, Fernando Falco; Universidade Federal de Viçosa; Bertol, Ildegardis; Universidade do Estado de Santa Catarina; Costa, Lucas Mucida; Universidade Federal de Viçosa; Menezes, Gleiph Ghiotto; Universidade Federal de Viçosa; Rodrigues, Nívia Carla; Universidade Federal de Viçosa. The purpose of this work was to develop a hydrological model for the simulation of the water balance in agricultural areas. The model uses a double exponential equation to represent the rainfall profile and uses the Green-Ampt-Mein-Larson equation to estimate the soil water infiltration rate. To evaluate the model, monthly and yearly rainfall and runoff data were obtained from four experimental plots located at the State University of Santa Catarina, UDESC, in the period from 2003 to 2008. The four treatments were bare soil (BS), conventional tillage (CT), minimum tillage (MT) and no-tillage (NT). The simulation was carried out using two synthetic rainfall series, one adjusted on a monthly basis (SAMB) and the other adjusted on a daily basis (SADB). The... Palavras-chave: Ciências Agrárias; Agronomia; Engenharia de Água e Solo; Conservação de Solo e Água 5.00.00.00-4; 5.03.02.00-0; 5.03.02.02-7 rrunoff; Infiltration; Water erosion; Hydrological modeling Ciências Agrárias; Engenharia de Água e Solo; Conservação de Solo e Água. Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/14733 Role of charcoal addition on infiltration processes and soil water content characteristics of a sandy loam soil CIGR Journal Villagra-Mendoza, Karolina. Terra preta (TP) is a soil amendment which is enriched with powdered charcoal, with nutrient sources from organic residues, and that constitutes a resource to improve soils for sustainable land use systems (Glaser, 2007).  Terra preta-dark soil is inspired by the highly successful historic practice of soil building in the Amazon and other parts of the world.  This work involves a relatively unexplored topic: the comprehension of infiltration processes and soil water content characteristics in a sandy loam soil combined with different fractions of terra preta amendments.  This analysis contributes to a better understanding of the relationship between fractions of charcoal in terms of terra preta content and soil water holding capacity.  First, a physical... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil conservation charcoal; Infiltration; Sandy loam; Sustainable farming; Terra preta; Water holding capacity. Ano: 2017 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3770 Estimation of infiltration rate of a paddy growing area in a micro watershed of Sikkim, India CIGR Journal Patle, G T. This study aimed to estimate the constant infiltration rates from paddy growing area of a micro watershed located in the hilly state of Sikkim, India. Double ring infiltometer test was used for the field measurement of infiltration rates. The observed infiltration rates were compared with predicted values obtained by Horton, Philip, Kostiokov and Green-Ampt infiltration models. The suitability analysis of models was checked through statistical tools namely coefficient of determination and standard error and the best model was identified for the paddy fields of hill topography. The soil samples were collected for the estimation of soil moisture content, bulk density and soil texture analysis. Soil texture was sandy loam to loamy sand within the micro... Tipo: Info:eu-repo/semantics/article Palavras-chave: Infiltration; Infiltration models; Paddy fields; Sikkim; Soil texture; Watershed. Ano: 2021 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6659 Registros recuperados: 66 Primeira ... 1 2 3 4 ... Última

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