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| Registros recuperados: 75 | |
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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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| BORGES, E.; ANTONINO, A.C.D.; DALL'OLIO, A.; AUDRY, P.; CARNEIRO, C.J.G.. |
| Dois metodos, utilizando permeametros a disco, foram usados para medir a sorvidade e a condutividade hidraulica em tres horizontes de um solo de Santa Maria da Boa Vista, Pernambuco, utilizando-se potenciais de fornecimento de agua de 0, -2,5, -5 e -10 cm de agua. No primeiro metodo, a condutividade hidraulica foi obtida atraves de estimativas da sorvidade e do fluxo estacionario, utilizando-se apenas um permeametro. No segundo, as medidas da sorvidade e da condutividade hidraulica foram feitas utilizando-se valores dos fluxos estacionarios, obtidos a partir de dois permeametros de diferentes raios. Esse segundo metodo apresentou resultados mais consistentes dos tempos - gravitacional e geometrico -, e do raio caracteristico de poros que o primeiro metodo.... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Permeametro; Infiltracao; Permeameter; Infiltration. |
| Ano: 1999 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/101085 |
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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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| Registros recuperados: 75 | |
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