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Registros recuperados: 3
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Apple orchard frost protection with wind machine operation IPB - Escola Superior Agrária
Ribeiro, A.C.; Melo-Abreu, J.P.M. de; Snyder, R.L..
Research has shown that wind machines are more effective under conditions of strong thermal inversions. Quantitative relationships between the level of protection and inversion strength, however, are not well known, and there are few reports on the effect of fan operation on energy balance. Whether the wind machines should be started before surface cooling causes turbulence damping and atmospheric stratification or if it is possible to delay starting until just before the critical temperature occurs remains a matter of discussion. Therefore, experiments were conducted on 11 spring frost nights during the 1999 and 2000 to assess the effectiveness of a fan operation on frost protection of an apple orchard under different microclimatic conditions. The 11...
Tipo: Article Palavras-chave: Frost protection; Malus pumila Mill.; Wind machine; Night cooling; Freeze damage.
Ano: 2006 URL: http://hdl.handle.net/10198/4236
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Arborização do cafezal com Grevillea robusta no Norte do Estado do Paraná. Repositório Alice
CARAMORI, P. H.; ANDROCIOLI FILHO, A.; BAGGIO, A..
1995
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Grevillea robusta; Sombra; Café; Coffea arabica; Geada; Shade; Coffee; Frost protection.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/handle/doc/303440
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Microclimatic characterization and productivity of coffee plants grown under shade of pigeon pea in Southern Brazil. Repositório Alice
MORAIS, H.; CARAMORI, P.H.; RIBEIRO, A.M. de A.; GOMES, J.C.; KOGUISHI, M.S..
Recent studies on coffee (Coffea arabica L.) cultivation in agroforestry systems in Southern Brazil have shown the potential of partial shading to improve management of this crop. The objective of this work was to evaluate microclimatic conditions and their effects on coffee production of plants shaded with pigeon pea (Cajanus cajan) in comparison to unshaded ones, from May 2001 to August 2002 in Londrina, State of Paraná, Brazil. The appraised microclimatic characteristics were: global radiation, photosynthetic and radiation balance; air, leaf and soil temperatures; and soil humidity. Shading caused significant reduction in incident global solar radiation, photosynthetically active radiation and net radiation, and attenuated maximum leaf, air and soil...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Coffea arabica; Cajanus cajan; Frost protection; Coffee production; Shade; Proteção contra geada; Photosynthetically active radiation; Produção de cafeeiros; Sombreamento.
Ano: 2006 URL: http://www.alice.cnptia.embrapa.br/handle/doc/118953
Registros recuperados: 3
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