Challenges in the development of analytical soil compaction models

Keller, Thomas; Lamandé, Mathieu

doi:10.1016/j.still.2010.08.004

Cited by 70 publications

(41 citation statements)

References 68 publications

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“…A recent analytical model is SoilFlex, easily usable, is based upon a description of the upper boundary condition (load of tyre) as an ellipse or a super ellipse, considering both normal and shear stresses, an analytical solution to compute the stress propagation and a calculation of the soil deformation (Keller et al 2007;Keller and Lamandé 2010). According to Keller et al (2007), "A weak point of the analytical solution may be the concentration factor, as it is not a directly measurable soil parameter.…”

Section: Stress-strain Models Based Upon Boussinesq Equationmentioning

confidence: 99%

“…Time is, thus, present in this model and this accounts for the fact that the rate of stress is a parameter of a paramount importance. The discrepancies between laboratory tests and field wheeling experiments have been ascribed to the differences in loading time (Keller and Lamandé 2010). In the soils, the localization of strain in shear bands separated by volumes behaving as more rigid can explain the observation of discrepancies when modelling the soils with clods or with an underlying dense layer at depths less than 0.5 m (Défossez and Richard 2002).…”

Section: Preferential Paths Of Stress Propagationmentioning

confidence: 99%

See 1 more Smart Citation

Soil compaction impact and modelling. A review

Nawaz¹,

Bourrié²,

Trolard³

2012

Agron. Sustain. Dev.

545

294

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Section: Stress-strain Models Based Upon Boussinesq Equationmentioning

confidence: 99%

Section: Preferential Paths Of Stress Propagationmentioning

confidence: 99%

Soil compaction impact and modelling. A review

Nawaz¹,

Bourrié²,

Trolard³

2012

Agron. Sustain. Dev.

545

294

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“…If not properly planned, mechanized land clearing and development may have negative consequences on the soil, causing deformation through compaction and shearing. Such structural changes in the soil will alter the pore size shape, distribution, and connectivity (Horn and Smucker, 2005;Keller and Lamandé, 2010). Compaction, for example, affects the soil physical fertility by impeding the storage and supply of water and nutrients while increasing the aggregate strength and resistance to root penetration, decreasing infiltration and water holding capacity, thereby reducing fertilization efficiency and consequently crop yield (Keller and Lamandé, 2010;Saffih-Hdadi, 2009).…”

Section: Introductionmentioning

confidence: 99%

Compressive response of some agricultural soils influenced by the mineralogy and moisture

Ajayi¹,

Dias²,

Curi³

et al. 2013

International Agrophysics

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A b s t r a c t. This study aimed to investigate the mineralogy, moisture retention, and the compressive response of two agricultural soils from South West Nigeria. Undisturbed soil cores at the A and B horizons were collected and used in chemical and hydrophysical characterization and confined compression test. X-ray diffractograms of oriented fine clay fractions were also obtained. Our results indicate the prevalence of kaolinite minerals relating to the weathering process in these tropical soils. Moisture retention by the core samples was typically low with pre-compression stress values ranging from 50 to 300 kPa at both sites. Analyses of the shape of the compression curves highlight the influence of soil moisture in shifts from the bi-linear to S-shaped models. Statistical homogeneity test of the load bearing capacity parameters showed that the soil mineralogy influences the response to loading by these soils. These observations provide a physical basis for the previous classification series of the soils in the studied area. We showed that the internal strength attributes of the soil could be inferred from the mineralogical properties and stress history. This could assist in decisions on sustainable mechanization in a datapoor environment.K e y w o r d s: precompression stress, mineralogy, load bearing capacity

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“…Atualmente, tem-se observado aumento de áreas agrícolas com problemas de compactação, em grande parte atribuído a operações mecanizadas, realizadas sem se considerar a umidade do solo (Saffih-Hdadi et al, 2009). A compactação resulta em problemas ambientais, agronômicos e econômicos como inundação, erosão, lixiviação de agrotóxicos, emissão de gases de efeito estufa e perda de rendimento das culturas agrícolas (Keller & Lamandé, 2010).…”

Section: Introductionunclassified

Compressibilidade do solo e sistema radicular da cana‑de‑açúcar em manejo com e sem controle de tráfego

Souza

Silva

et al. 2012

Pesq. agropec. bras.

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de piloto automático. As amostras de solo foram coletadas em cilindros volumétricos, na soqueira e na entrelinha da cultura (linha de rodado), nas camadas de 0,00-0,10 e 0,20-0,30 m. Avaliou-se a densidade radicular por meio de imagens, obtidas da digitalização de raízes coletadas em monólitos de 0,25x0,10x0,10 m. O manejo sem controle de tráfego apresentou maior capacidade de suporte de carga do solo na linha de plantio, nas duas camadas de solo avaliadas, o que indicou maior compactação. Maior densidade radicular ocorreu no manejo com controle de tráfego com ajuste da bitola e piloto automático, que permitiu maior capacidade de suporte de carga na linha de rodado e preservou a qualidade estrutural na região da soqueira, com reflexo positivo sobre o desenvolvimento do sistema radicular da cana-de-açúcar.Termos para indexação: Saccharum, capacidade de suporte de carga, colheita mecanizada, estrutura do solo, pressão de preconsolidação. Soil compressibility and root system of sugarcane with and without controlled-traffic farmingAbstract -The objective of this work was to compare the load-carrying capacity of the soil in a mechanically harvested sugarcane area, without burning, in managements with and without controlled traffic farming. Controlled traffic was done adjusting the gauges of tractor and trailer, or adjusting the gauges and using autopilot. Soil samples were collected in volumetric cylinders in plant rows and inter-rows (wheel rows), from 0.00-0.10 and 0.20-0.30-m soil depths. Root density was measured by images, obtained by scanning the collected roots in 0.25x0.10x0.10-m monoliths. The management without controlled traffic showed a higher load-carrying capacity of the soil in the planting rows, in both soil layers, which indicates a higher compaction. Greater root density occurred in the management with controlled traffic with gauge adjustment and use of autopilot, which made possible a higher load-carrying capacity in wheel rows, and preserved structural quality in the plant rows, resulting in a greater root system development of sugarcane.

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Challenges in the development of analytical soil compaction models

Cited by 70 publications

References 68 publications

Soil compaction impact and modelling. A review

Soil compaction impact and modelling. A review

Compressive response of some agricultural soils influenced by the mineralogy and moisture

Compressibilidade do solo e sistema radicular da cana‑de‑açúcar em manejo com e sem controle de tráfego

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