Field testing of a soil compaction model

Gupta, Satish C.; Hadas, A.; Voorhees, W. B.; Wolf, D.; Larson, W. E.; Schneider, E. C.

doi:10.1016/0022-4898(85)90127-2

Cited by 8 publications

(2 citation statements)

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“…However signifi cant differences were observed only at 10 depth in the following order: a was lowest at the center of the wheel rut and highest at the periphery of the wheel, with intermediate values at 20 cm from the center of wheel rut. This pattern of a at this depth portrays the stress distribution pattern in the tyre-soil contact areas as proposed in several studies (4,6,9).…”

Section: Resultssupporting

confidence: 76%

“…This is similar to assuming that the vehicle pass would resulted in uniform changes in the soil physical properties (at any depth) within the wheel rut (soil-tyre contact area). In spite of these, it has long been since many modeling (4,5,6,7) and measurement (8,9,10) studies indicating inhomogeneous stress distribution under vehicle wheels. The objective of this study was to investigate the impact of vehicle traffi c on soil physical properties and air permeability by systematic collection of samples in a transect running from the center to the outside of the wheel rut.…”

Section: Introductionmentioning

confidence: 99%

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Wheel traffic effect on air-filled porosity and air permeability in a soil catena across the wheel rut

et al. 2012

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The impact of wheel traffi c on soil physical properties is usually quantifi ed by randomly collecting soil cores at specifi c depths below the wheeled surface. However, modeling studies as well as few measurements indicated a non-uniform stress distribution in a catena across the wheel rut, which might induce different effects on soil physical properties. The objective of this study was to investigate the impact of vehicle traffi c on soil physical properties and air permeability by systematic collection of samples in a transect running from the center to the outside of the wheel rut. A fi eld experiment was conducted on a clay loam soil at Suberg, Switzerland, in 2010. Four repeated wheeling were performed by driving a forage harvester (wheel load of 6100 kg and a tyre width of 0.8 m) forward and rearward in the same track. We sampled 100 cm 3 intact cores at 10, 30 and 50 cm depth in a soil catena running from center of the wheel rut to un wheeled part of the fi eld ( 0, 20, 40, 50,60 and 400 cm horizontal distance). We measured water retention and air permeability (k a ) at -30, -100 and -300 hPa matric potentials. At -100 hPa, we obtained consistently lower air fi lled under the wheel rut than at the periphery of the wheel rut (0.4 m) or outside the wheel rut. At least one of these differences a was signifi cant at all soil depths . At all matric potentials, the k a was lowest at the periphery of the wheel rut and highest outside the wheel rut, with intermediate values inside the wheel rut. However signifi cant differences in k a were obtained only at 10 cm depth. The lowest air permeability at the periphery of the wheel rut is interpreted as a distortion of the soil pores due to shear strain rather than isotropic compaction. Our results indicate that sampling in the soil catena can provide better resolution on information about traffi c induce changes on soil physical properties.

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Section: Resultssupporting

confidence: 76%