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| Registros recuperados: 23 | |
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| Sales,Luís Eduardo de Oliveira; Carneiro,Marco Aurélio Carbone; Severiano,Eduardo da Costa; Oliveira,Geraldo César de; Ferreira,Mozart Martins. |
| Apesar da existência de informações descritivas sobre solos arenosos das regiões tropicais, àquelas referentes ao manejo e conservação são escassas. No presente estudo, objetivou-se avaliar as alterações dos atributos físico-hídricos de um Neossolo Quartzarênico Órtico em função do uso e manejo com vistas à definição de sistemas de manejo sustentáveis. O estudo foi conduzido no município de Mineiros, GO, em áreas submetidas a cinco sistemas de uso e manejo do solo, sendo: Pastagem (PAS), Plantio direto de Soja (PDS) e de milho (PDM), Integração agricultura-pecuária (IAP) e cerrado nativo (CER). Coletaram-se cinco amostras por sistema nas camadas de 0 a 10 e 10 a 20 cm no inverno de 2005 e verão de 2006, para avaliação da densidade do solo, micro e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manejo de solos arenosos; Plantio direto; Integração lavoura pecuária; Alterações estruturais do solo. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542010000300020 |
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| Souza,Marcos André Silva; Silva,Douglas Ramos Guelfi; Ávila,Fabrício William; Faquin,Valdemar; Oliveira,Geraldo César de; Bastos,Carla Elisa Alves. |
| Soil compaction directly interferes on crop yield. The objectives of this work were to evaluate the effect of previous cultivation with palisade grass [Urochloa brizantha (C. Hochstetter ex A. Rich.) R. Webster cv. Marandu] and the use of soil correctives on the growth and yield of soybeans (Glycine max L.) cultivated under various soil compaction levels, in greenhouse conditions. The experiment was conducted in pots (columns) of 0.2 m diameter PVC tubes, composed of two rings: the lower ring, 0.4 m in height, received the soil (dystrophic Red Latosol, clayey texture) without corrective and a density of 1.0 Mg m-3; and the upper ring, 0,2 m in height, received the treatments of soil correctives and density. The experimental design was fully randomized in a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urochloa brizantha; Glycine max; Soil density; Crop sequence. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600013 |
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| Ribeiro,Bruno Teixeira; Lima,José Maria de; Mello,Carlos Rogério de; Sá,Marcos Aurélio Carolino de; Oliveira,Geraldo César de. |
| The aim of this work was to compare aggregate disruption of undisturbed soil samples by ultrasonic energy to aggregate disruption caused by the energy of simulated raindrops, to provide equations that can describe this relationship, and to evaluate whether aggregate stability, expressed by sonication method, may be used to estimate the effect that raindrops have on undisturbed soil samples. Undisturbed soil samples from A, Bi and C horizons of a Cambisol were submitted to different levels of ultrasonic energy and simulated raindrops. Sieved samples (aggregates) were also submitted to different levels of ultrasonic energy so that both disturbed and undisturbed conditions of samples could be compared. The results showed that the method using ultrasonic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aggregation; Soil structure; Ultrasound. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000300021 |
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| Registros recuperados: 23 | |
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