Preconsolidation Pressure
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Soil compaction on traffic lane due to soil tillage and sugarcane mechanical harvesting operations
ABSTRACT: Mechanical sugarcane harvesting increases soil compaction due to the intense traffic of agricultural machinery, reducing longevity of sugarcane crops. In order to mitigate the harmful effects caused by agricultural traffic on the soil structure in sugarcane fields, this study evaluated impacts of mechanical sugarcane harvesting on traffic lane unde
Sci. agric. (Piracicaba, Braz.). Publicado em: 30/05/2019
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2. Compressibility and water availability in Albaqualf soils under different deployment times in no-tillage
ABSTRACT: The southern Brazilian lowlands have been historically used for flooded rice cultivation. Over time, heavy machinery and intensive tillage practices have resulted in soil structure disruption, soil compaction, higher production costs and lower agricultural profitability. This study aimed to evaluate the effect of different deployment times of no-ti
Sci. agric. (Piracicaba, Braz.). Publicado em: 2018-09
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3. Soil Compressibility under Irrigated Perennial and Annual Crops in a Semi-Arid Environment
ABSTRACT In irrigated soils, a continuous state of high moisture reduces resistance of the soil to applied external forces, favouring compaction. The aim of this study was to evaluate the susceptibility to compaction of developed calcareous soils in irrigated annual and perennial cropping systems of the Apodi Plateau, located in the Brazilian semi-arid regio
Rev. Bras. Ciênc. Solo. Publicado em: 20/07/2017
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4. Compressibilidade e resistência ao cisalhamento de um Latossolo cultivado com eucalipto / Compressibility and shear strength of a Latosol cultivated with Eucalyptus
O eucalipto tem sido a principal opção para reflorestamento, levando à expansão, em termos geográficos, do cultivo dessa espécie no Brasil. Essa expansão vem sendo acompanhada pela adoção de novas tecnologias de cultivo, entre elas a mecanização das operações de colheita. As operações mecanizadas realizadas de maneira inadequada promovem um im
Publicado em: 2010
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5. Assessment of the Cambisol structure sustainability under different land uses systems in Western Amazon. / AvaliaÃÃo da sustentabilidade da estrutura de um Cambissolo sob diferentes sistemas de uso da terra na AmazÃnia Ocidental.
The adequate use of the soil is important for the preservation of the natural resources and for a search of a sustainable agriculture. However, itâs inadequate use promotes degradation of the soil altering its physical, chemical and biological properties. In order for the soil management happens in a sustainable way it is important to diagnose through effic
Publicado em: 2009
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6. COMPORTAMENTO FÍSICO DE UM LATOSSOLO SOB INTEGRAÇÃO LAVOURA - PECUÁRIA / PHYSICAL BEHAVIOR OF A OXOSOL UNDER CROP-LIVESTOCK INTREGATION
Soil compaction under traffic of animals has become an increasingly significant problem in soils used for crop-livestock integration. The objective of this study was to determine the effect of integration crop-livestock and different soil management systems on their attributes water and mechanical and relate them to the development and productivity of soybea
Publicado em: 2009
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7. Indicadores de qualidade estrutural na avaliaÃÃo da compactaÃÃo do solo em decorrÃncia da colheita mecanizada da cana-de-aÃÃcar. / Indicators of structural quality in the evaluation of soil compaction due to mechanized harvesting of sugarcane.
The mechanized harvesting of sugarcane in inadequate water contents in the soil has been responsible for soil compaction and reduction of yield in the later cycles of the crop. The identification of the impacts of mechanized harvesting of the sugarcane crop on soil structure, in different classes can become an important cropping strategy for minimization of
Publicado em: 2007
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8. Modelos de capacidade de suporte de carga de um Latossolo submetido a diferentes sistemas de manejo de plantas daninhas em lavoura cafeeira / Bearing capacity models of a Latossol submitted to different weed management system in coffee crop.
The determination of the pressures that can be applied to the soils submitted to different weed management systems is important to adapt the coffee crop management in a sustainable way. The objectives of this study were: a) to develop the bearing capacity models for a Red-Yellow Latossol (LVA) cultivated with coffee and submitted to different weed management
Publicado em: 2007
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9. Modelagem e quantificaÃÃo da compactaÃÃo de latossolos cultivados com eucalipto / Pattern and quantification from compactation in the Latosols cultivated with eucalypt.
The harvest operations and wood transport involves intensive traffic of machines on the soil, which may traffic in a same line several times, or randomly. Besides the passes number, the wood load transported also may affect the soil compaction, when the applied pressures for the machines exceed its bearing support capacity, altering the place where the root
Publicado em: 2006
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10. Load support capacity of a latosol cultivated with coffee plantation under associated methods of weed control / Capacidade suporte de carga de um latossolo submetido a mÃtodos associados de controle de plantas daninhas em cafeeiros.
The control of weeds plants in the coffee plantation can be made through chemical and mechanical methods, which could promote alterations in the soil structure. The objectives of this study were: a) to develop bearing capacity models, for a Yellow Red Latosol cultivated with coffee, as a function of the associated methods of weed control, preconsolidation pr
Publicado em: 2006
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11. Indicadores de qualidade estrutural e trafegabilidade de latossolos e argissolos vermelhos. / Indicators of structural quality and trafficability of hapludox and hapludalf.
The soil, besides being one of the basic resources of the natural and agricultural ecosystems, has been considered a finite, fragile and no renewable resource. For this reason the maintenance of its quality has been acquiring great relevance in the last decades. Several soil physical quality indicators have been used with the intention of developing guides o
Publicado em: 2002
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12. Estimativa da tensão de pre-adensamento de argilas saturadas atraves do ensaio de palheta : extensão para limites de liquidez superiores a 70%
This work was based on the "Indirect Method to Pre-consolidation Pressure Estimation Through Vane Tests", proposed by CA VICCHIA (1990). The referred method was reviewed and improved. Therefore, sixty-two samples, previously consolidated with an well defined preconsolidation pressure range, were taken to rupture through a vane test. The values of preconsolid
Publicado em: 2000