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| Registros recuperados: 71 | |
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| King, B.A.; Bjorneberg, D.L.. |
| A 4-wheeled commercial irrigation boom was modified for use in investigating center pivot design and management effects on infiltration, runoff and erosion of specific soil types. The center pivot simulator used a hydraulic winch attached to the front of a tractor for mobilization and controlled travel speed. A 3 inch diameter 300 ft drag hose is used to supply water to the center pivot simulator. The center pivot simulator was used to conduct two studies to investigate infiltration, runoff and erosion differences of common commercially available center pivot sprinkler types on a Portneuf silt loam soil. Sprinklers used in the first study were: 1) Nelson R3000 with brown plate, 2) Nelson R3000 with red plate, 3) Nelson S3000 with purple plate, and... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Erosion; Infiltration; Center pivot; Erosion; Mass Import - autoclassified (may be erroneous). |
| Ano: 2007 |
URL: http://eprints.nwisrl.ars.usda.gov/965/1/1236.pdf |
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| Feitosa,Carlos E. L.; Costa,Pedro H. dos S.; Meneses,Kamila C. de; Oliveira,Ulisses C. de; Farias,Maryzélia F. de. |
| ABSTRACT Soil compaction in agricultural areas has greatly increased in recent decades due to intensive farming practices, including short-cycle crops and machinery intensification. This study aimed to evaluate the impacts of management systems on the physical quality of a dystrophic Yellow Oxisol, in the Cerrado region of Brazil. Treatments consisted of five soil management systems, with five replications (native forest [control], slash-and-burn agriculture, pasture, no-tillage, and conventional tillage). Data analysis was performed using a completely randomized experimental design. All systems were analyzed for soil density, macroporosity, microporosity, total porosity, hydraulic conductivity, infiltration, water retention curve, penetration resistance,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: S index; Land cover change; Physical properties; Infiltration; Soil compaction. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000500609 |
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| Mancilla Villa, Oscar Raúl. |
| Los objetivos de esta investigación fueron realizar el diseño, trazo y construcción de terrazas de banco para plantaciones forestales comerciales en el Rancho Jesús María, Valle de Bravo, México, evaluar su eficiencia técnica y determinar su factibilidad financiera. El diseño consistió en determinar los intervalos vertical y horizontal de los bancales, con base en la precipitación, pendientes dominantes en el terreno (15% y 30%), la textura del suelo y los requerimientos del silvicultor; se diseñaron 70 terrazas con 3 m de ancho por 0.45 m y 0.90 m de alto para las pendientes respectivas, en un total de 4 ha de terreno y se plantaron 3,757 árboles comerciales. Para la eficiencia técnica se midieron la infiltración, el escurrimiento superficial y la... |
| Tipo: Tesis |
Palavras-chave: Terrazas de banco; Pérdida de suelo; Escurrimiento superficial; Infiltración; Eficiencia técnica; Viabilidad financiera; Maestría; HIdrociencias; Bench terraces soil loss; Superficial glide; Infiltration; Technical efficiency; Financial viability. |
| Ano: 2008 |
URL: http://hdl.handle.net/10521/1422 |
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| Mon,Rodolfo; Irurtia,Carlos; Fernando Botta,Guido; Pozzolo,Oscar; Bellora Melcón,Fernando; Rivero,David; Bomben,Miguel. |
| The effects of supplementary irrigation on soil chemical and physical properties were studied in 21 locations in the north of the rolling pampa region of Argentina. The chemical and physical variables were measured in top soil (0-100 mm) to compare irrigated and non-irrigated soils. Chemical variables were: electrical conductivity (EC), pH, exchangeable sodium percentage (ESP), and organic mater content. Physical variables included structural index (SI) and percolation index (PI) measured in the laboratory, as well as infiltration, runoff, and soil losses, measured in the field with a small portable rainfall simulator. Water quality was established according to its chemical composition and Riverside USA classification. In irrigated soils, chemical data... |
| Tipo: Journal article |
Palavras-chave: Erosion risk; Infiltration; Sodication; Supplementary irrigation. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202007000300002 |
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| 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 |
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| PEREIRA, G. M.; SOARES, A. A.; BERNARDO, S.; COUTO, L.; GOMIDE, R. L.. |
| Conduziu-se uma pesquisa com a finalidade de estudar as caracteristicas de avanco e infiltracao da agua em sulcos com aplicacao de agua continua e intermitente. Foram testadas as vazoes de 0,4, 0,8 e 1,2 1.s-1 e tempos ciclicos de 20, 40 e 60 min com taxa ciclica de 0,5. A velocidade de avanco aumentou, para a vazao de 0,4 1.s-1, nos tres tempos ciclicos, em relacao ao escoamento continuo, e para a vazao de 0,8 1.s-1, nos tempos ciclicos de 40 e 60 min. Entretanto, nao houve diferenca entre os tempos de avanco com irrigacao continua e intermitente para a vazao de 1,2 1.s-1. Os efeitos da irrigacao intermitente foram mais acentuados durante a primeira irrigacao. Os volumes de agua aplicada para conclusao do avanco foram menores no escoamento intermitente... |
| Tipo: Parte de livro |
Palavras-chave: Infiltration; Dark red latossol.; Infiltração; Irrigação; Latossolo Vermelho Escuro.; Irrigation.. |
| Ano: 1992 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/478624 |
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| Registros recuperados: 71 | |
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