Avaliação da intensidade de tráfego e carga de um forwarder sobre a compactação de um Latossolo Vermelho-Amarelo

Silva, Arystides Resende; Dias, Moacir de Souza; Leite, Fernando Palha

doi:10.1590/s0100-67622011000300017

Cited by 15 publications

(17 citation statements)

References 18 publications

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“…The intensity of traffic has negative effects on the physical and hydraulic properties of the soil, increasing density values and penetration resistance. Results corroborate with those found by Silva et al (2011), who assessing traffic intensity of two, four and eight times of a Forwarder on the compaction of a Haplustox, in the depths of (0 to 0.03 m) and (0.10 to 0.13 m), concluded that all traffic intensities caused soil compaction at both studied depths, and four run overs were the ones that caused higher soil compaction. A study perfomed by Couto et al (2013) also showed similar results.…”

Section: Resultssupporting

confidence: 89%

Simulated Traffic Dynamic Loading on Physical Properties of a Red Latosol under No-Tillage

Santos¹,

Viana²,

Silva³

et al. 2018

JAS

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The use of intensive mechanization in no-tillage areas can change soil physical conditions, mainly in the "Cerrado", which has reduced cover ratio. This study aimed to evaluate physical and mechanical properties of a red latosol under no-tillage and subjected to simulated dynamic traffic in different surfaces conditions. For this, soil samples were collected, with dimensions of 0.2 × 0.2 × 0.3 m (height, width and length), in an area subjected to no-tillage in the last four years. Subsequently, samples were transported to the laboratory and subjected to different traffic levels in a simulator. Shortly after, a completely randomized experimental design was set up, in factorial 2 × 5, with two covers (with and without haystack) and five traffic levels (zero, one, two, four and eight run overs) applied by the simulator. Assessed physical properties were superficial settlement, soil density, compaction degree and pre-consolidation pressure. Results showed that superficial settlement, soil density and compaction degree were significantly influenced by soil cover and traffic intensity. Pre-consolidation was not affected by cover, and had higher values when subjected to more traffic intensity.

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Section: Resultssupporting

confidence: 89%

Simulated Traffic Dynamic Loading on Physical Properties of a Red Latosol under No-Tillage

Santos¹,

Viana²,

Silva³

et al. 2018

JAS

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“…Esses resultados corroboram com os encontrados por Silva et al (2011) que, avaliando a intensidade do tráfego de duas, quatro e oito vezes de um Forwarder sobre a compactação de um Latossolo Vermelho-Amarelo nas profundidades de (0-0,03 m) e (0,10-0,13 m) concluíram que todas as intensidades de tráfego causaram compactação no solo nas duas profundidades estudadas, sendo quatro passadas as que ocasionaram maior compactação do solo. O número de passadas igual a oito causou menor compactação que o número de passadas igual a quatro na profundidade de 0-0,03 cm.…”

Section: Resultados E Discussõesunclassified

Compactação e recalque superficial de um Latossolo Vermelho em condição de campo e laboratório

Couto

Reis

Viana

et al. 2013

Rev. bras. eng. agríc. ambient.

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RESUMOA aplicação de cargas dinâmicas no solo pelos rodados agrícolas, produz tensões na interface solo/pneu em superfície e profundidade. O objetivo deste trabalho foi avaliar a compactação e o recalque superficial de um Latossolo Vermelho quando submetido a diferentes níveis de tráfego em condições de campo e laboratório e propor uma metodologia para o ensaio de cargas dinâmicas oriundas de tráfegos de rodados pneumáticos, aplicável em laboratório. No campo foi utilizado um trator agrícola e no laboratório um simulador de tráfego. Nos dois experimentos foi adotado o delineamento em blocos ao acaso no esquema de parcelas subdivididas com quatro repetições. As parcelas foram constituídas de duas pressões de inflagem dos pneus: 96,5 e 137,9 kPa e as subparcelas, de cinco intensidades de tráfego: zero (testemunha), uma, duas, quatro e oito passadas do trator ou da roda do simulador, de acordo com o experimento. As variáveis mensuradas foram: densidade do solo, grau de compactação e recalque superficial. As duas primeiras variáveis foram analisadas na profundidade de 0-0,10 m. O simulador de tráfego mostrou-se adequado para reproduzir as situações observadas no campo. Palavras-chave: máquinas agrícolas, simulador de tráfego, grau de compactaçãoCompaction and superficial settlement of an Oxisol under field and laboratory conditions ABSTRACT The application of dynamic loads in the soil, produces stress in wheel/soil interface in surface and depth. The aim of this study was to evaluate the compaction and superficial settlement of an Oxisol under different traffic levels under field and laboratory conditions; and to propose a methodology for dynamic load test, from traffic of the pneumatic wheel, applicable in the laboratory. In the field an agricultural tractor was used and in laboratory a traffic simulator. In the two experiments a randomized block design in split plots with four replications was adopted. The plots consisted of two tire inflation pressure: 96.5 and 137.9 kPa, and the subplots were five traffic intensities: zero (control), one, two, four and eight passes of the tractor or wheel simulator, according to the experiment. The variables measured were density of dry soil, degree of compactness and superficial settlement. The first two variables were analysed in the depth of 0-0.10 m. The traffic simulator was adequate to reproduce the situation observed in the field.

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“…Several factors affect soil compaction in eucalypt forests, such as soil type and soil horizon/layer ; climatic season and, also related, soil moisture (Dias Junior et al, 2005); machinery kind , 2005Lopes et al, 2015); traffic intensity (Dias Junior et al, 2008;Martins et al, 2013;Pezzoni Filho et al, 2014); machinery load Leite, 2011); and soil cover Leite, 2007Leite, , 2010Szymczak et al, 2014). It is, therefore, fundamental to understand how machinery traffic during harvest and logging operations in forestry production affects soil load bearing capacity and the occurrence of soil compaction, especially when mechanized operations are performed on excessively moist conditions (Dias Junior et al, 2005;Kamimura et al, 2012;Vischi Filho et al, 2015), aiming to adapt management practices in order to preserve soil structure and forests yield potential.…”

Section: Introductionmentioning

confidence: 99%

Soil compaction caused by harvest and logging operations in eucalyptus forests in coarse-textured soils from northeastern Brazil

et al. 2017

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Planted forests occupy more than 6.5 million ha in Brazil, where harvest and logging operations are performed with increasingly heavier machinery, increasing the risk of soil compaction. Soil compaction can be avoided if soil load bearing capacity is not exceeded, what makes it important to assess both the soil strength and the impact of different operations. The aim of this study was to evaluate the load bearing capacity of some coarse textured soils (two Hapludult and one Haplorthod) in two soil horizons (BA and B), from northeastern Brazil; and to assess the impact of harvest and logging operations performed with harvester and forwarder. Although the Haplorthod presented higher load bearing capacity in both the BA horizon (for the whole moisture range) and the B horizon (for higher water contents), it suffered the greatest soil compaction. Traffic with the harvester resulted in soil compaction in both the BA and the B horizons, but the increase in bulk density was higher on the later, reaching 18.7% in the Haplorthod. The forwarder traffic intensity and the presence of plant residue cover significantly affected the occurrence of soil compaction. In the BA horizon, the increase in soil bulk density for different forwarder traffic intensities was 3 passes ~ 6 passes < 12 passes ~ 16 passes. The increase in bulk density was higher in the Haplorthod, reaching 32% after 16 forwarder passes over bare soil. Significant linear regressions were obtained from the number of forwarder passes and the increase in bulk density. Index terms:Harvester; forwarder; precompression stress; soil load bearing capacity. RESUMOAs florestas plantadas ocupam mais de 6,5 milhões de ha no Brasil, nas quais as operações de colheita e baldeio são realizadas com maquinário cada vez mais robusto, o que aumenta o risco de compactação do solo. A compactação do solo pode ser evitada se a sua capacidade de suporte de carga não for excedida, o que torna importante a avaliação tanto da resistência mecânica do solo quanto o impacto de diferentes operações. O objetivo deste estudo foi avaliar a capacidade de suporte de carga de solos de textura grosseira (dois Hapludult e um Haplorthod) em dois horizontes (BA e B) do Nordeste do Brasil; além de avaliar o impacto das operações de colheita e baldeio de madeira realizadas com harvester e forwarder. Apesar de o Haplorthod ter apresentado a maior capacidade de suporte de carga no horizonte BA (para toda a faixa de umidade) e no horizonte B (para maiores umidades) ele foi a classe de solo que apresentou maior compactação. O tráfego com o harvester resultou em compactação tanto no horizonte BA quanto no B, mas o aumento da densidade do solo foi maior no último, chegando a 18,7% no Haplorthod. A intensidade de tráfego do forwarder e a presença de resíduos de plantas na superfície do solo afetaram significativamente a ocorrência de compactação do solo. No horizonte BA, o aumento da densidade do solo em decorrência da intensidade de tráfego do forwarder foi de 3 passadas ~ 6 passadas < 12 passadas ~ 1...

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Avaliação da intensidade de tráfego e carga de um forwarder sobre a compactação de um Latossolo Vermelho-Amarelo

Cited by 15 publications

References 18 publications

Simulated Traffic Dynamic Loading on Physical Properties of a Red Latosol under No-Tillage

Simulated Traffic Dynamic Loading on Physical Properties of a Red Latosol under No-Tillage

Compactação e recalque superficial de um Latossolo Vermelho em condição de campo e laboratório

Soil compaction caused by harvest and logging operations in eucalyptus forests in coarse-textured soils from northeastern Brazil

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