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| Severiano,Eduardo da Costa; Oliveira,Geraldo César de; Dias Júnior,Moacir de Souza; Costa,Katia Aparecida de Pinho; Benites,Vinícius de Melo; Ferreira Filho,Silvio Marcos. |
| Currently in Brazil, as in other parts of the world, the concern is great with the increase of degraded agricultural soil, which is mostly related to the occurrence of soil compaction. Although soil texture is recognized as a very important component in the soil compressive behaviors, there are few studies that quantify its influence on the structural changes of Latosols in the Brazilian Cerrado region. This study aimed to evaluate structural changes and the compressive behavior of Latosols in Rio Verde, Goiás, through the modeling of additional soil compaction. The study was carried out using five Latosols with very different textures, under different soil compaction levels. Water retention and soil compression curves, and bearing capacity models were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Preconsolidation pressure; Beneficial pressure; Critical pressure; Degradation of agricultural soils; Particle-size-distribution. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000300014 |
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| Severiano,Eduardo da Costa; Oliveira,Geraldo César de; Dias Júnior,Moacir de Souza; Costa,Katia Aparecida de Pinho; Silva,Fabiano Guimarães; Ferreira Filho,Silvio Marcos. |
| The agricultural potential of Latosols of the Brazilian Cerrado region is high, but when intensively cultivated under inappropriate management systems, the porosity can be seriously reduced, leading to rapid soil degradation. Consequently, accelerated erosion and sedimentation of springs and creeks have been observed. Therefore, the objective of this study was to evaluate structural changes of Latosols in Rio Verde, Goiás, based on the Least Limiting Water Range (LLWR), and relationships between LLWR and other physical properties. Soil samples were collected from the B horizons of five oxidic Latosols representing the textural variability of the Latosols of the Cerrado biome. LLWR and other soil physical properties were determined at various soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil compaction; Degradation of agricultural soils; Soil penetration resistance; Water availability; Soil texture. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000300013 |
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| Oliveira,Itamar Pereira de; Costa,Katia Aparecida de Pinho; Faquin,Valdemar; Maciel,Giovana Alcantara; Neves,Belmiro Pereira das; Machado,Elizandra Luisa. |
| No cenário da pecuária brasileira, as pastagens são cultivadas em solos de baixa fertilidade, com teores muito baixos de cálcio, magnésio e enxofre. A calagem e a gessagem são os meios mais comuns para aumentar o nível de cálcio nesses solos. Diante disso, objetivou-se avaliar o efeito de fontes de cálcio no desenvolvimento de gramíneas solteiras e consorciadas. O experimento foi conduzido em casa de vegetação da Embrapa Arroz e Feijão, em um Latossolo Vermelho de textura argilosa. O delineamento experimental utilizado foi blocos ao acaso com esquema fatorial 3 x 2 x 2, sendo três tratamentos referentes ao cálcio (testemunha, calcário e gesso), duas gramíneas (Brachiaria brizantha cv. Marandu e Brachiaria humidicola) e duas gramíneas consorciadas com... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria brizantha cv. Marandu; B. humidicola; Calopogonium muconoides; Calcário e gesso. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000200036 |
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