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| Santos,Antonio O.; Prado,Hélio do. |
| A expressiva área de cultivo de milho no Brasil e a necessidade constante de aprimoramento do seu manejo, justificam o estudo sobre novas metodologias de tratamento dos recursos financeiros ou técnicos destinados à produção. A cultura do milho tem demonstrado significativa variabilidade espacial da produtividade em estudos sobre a questão e variabilidade temporal também pode ser esperada, ao longo das estações de crescimento. A observação do crescimento e do desenvolvimento de cultivos através de modelos de simulação, pode servir de apoio para o estudo das causas das variabilidades citadas, além de atuar como elemento de integração de dados de solo, planta e clima, principalmente em estudos sobre implementação do manejo localizado, onde se busca aproveitar... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ceres-Maize; Agrometeorologia; Água e solo; Zea mays L.. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662002000100018 |
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| Bazaglia Filho,Osmar; Rizzo,Rodnei; Lepsch,Igo Fernando; Prado,Hélio do; Gomes,Felipe Haenel; Mazza,Jairo Antonio; Demattê,José Alexandre Melo. |
| Since different pedologists will draw different soil maps of a same area, it is important to compare the differences between mapping by specialists and mapping techniques, as for example currently intensively discussed Digital Soil Mapping. Four detailed soil maps (scale 1:10.000) of a 182-ha sugarcane farm in the county of Rafard, São Paulo State, Brazil, were compared. The area has a large variation of soil formation factors. The maps were drawn independently by four soil scientists and compared with a fifth map obtained by a digital soil mapping technique. All pedologists were given the same set of information. As many field expeditions and soil pits as required by each surveyor were provided to define the mapping units (MUs). For the Digital Soil Map... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil cartography; Detailed soil survey; Remote sensing; Soil-landscape relationship. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500003 |
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| Landell,Marcos Guimarães de Andrade; Prado,Hélio do; Vasconcelos,Antônio Carlos Machado de; Perecin,Dilermando; Rossetto,Raffaella; Bidoia,Márcio Aurélio Pitta; Silva,Marcelo de Almeida; Xavier,Mauro Alexandre. |
| In spite of the great homogeneity found in the morphological characteristics of Oxisols, there is great chemical diversity in subsurface layers of these soils. Studies indicate that crop yield presents significant correlation with the chemical attributes of the subsurface, which, are more stable than attributes found in the plough layer, subject to greater alterations as a consequence of agricultural exploration. This work evaluated the effects of subsurface chemical attributes of Oxisols of the South Central region of Brazil, on the yield of sugarcane clones and of variety RB72454, during the first, second and third cropping cycles. Productivity data were obtained between 1993 and 1998. Soils were characterized in terms of their mechanical analysis and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yield; Soils; Linear models; Chemical analysis. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400020 |
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