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	Provedor de dados Ciencia e Investigación Agraria (1) REA (1) Autor Alvarez,José (1) Bown,Horacio E (1) Mañon,Alejandro (1) Meira Junior,Agenor D. de (1) Navarro-Cerrillo,Rafael (1) Pedrali,Patricia C. (1) Schmidt,Edomir M. (1) Thesing,Nelson J. (1) Toral,Manuel (1) Valdiero,Antonio C. (1) Mais... Palavra-chave Toppling (2) Irrigation (1) Pivot (1) Ripping (1) Soil fertility (1) Stability (1) Tap root (1) Wind (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Journal article (1) Ano 2019 (1) 2011 (1) País Brazil (1) Chile (1) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Wind-induced leaning (toppling) in young Pinus radiata plantations in Chile Ciencia e Investigación Agraria Toral,Manuel; Bown,Horacio E; Mañon,Alejandro; Alvarez,José; Navarro-Cerrillo,Rafael. The toppling of young trees considerably reduces the value of the first log in Pinus radiata plantations. Although wind is the main cause of toppling, the quality and type of plants, planting techniques, soil fertility and soil preparation may play an important role in the susceptibility of the species to toppling. This article analyzes the influence of ripping and soil type on the probability of P radiata toppling after severe windstorms in central south Chile. To this aim, pairs of similar trees with and without toppling were selected in 2001 in six soil types with and without soil ripping. Root system differences in toppled versus straight trees were compared to gain better insight into the causes of the phenomenon. Among all root measurements, the... Tipo: Journal article Palavras-chave: Ripping; Soil fertility; Tap root; Toppling. Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000300010 THE TOPPLING OF AN IRRIGATION CENTER PIVOT SUBMITTED TO WIND ACTION EFFECTS REA Schmidt,Edomir M.; Meira Junior,Agenor D. de; Pedrali,Patricia C.; Valdiero,Antonio C.; Thesing,Nelson J.. ABSTRACT This research aims to improve the study about the stability of truss structures used in pivot irrigation, widely used due to the growing demand for food production, when submitted to wind effects. Specifically, it aims to verify the maximum wind speed supported by an irrigation center pivot structure when submitted to the load effects caused by wind gusts perpendicular to the equipment. In order to determine these forces and their effects on the irrigation equipment, computational numerical investigations were carried out using finite element bar models validated by measuring the natural frequency of the equipment in the field. A span was designed based on the existing standards in Brazil and the dynamic response of the structure was examined... Tipo: Info:eu-repo/semantics/article Palavras-chave: Toppling; Stability; Wind; Pivot; Irrigation. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000200150 Registros recuperados: 2 Primeira ... 1 ... Última

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