Soil changes after traffic with a tracked and a wheeled forest machine: a case study on a silt loam in Sweden |
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| Authors: | JANSSON K-J; JOHANSSON J |
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| Institution: | Swedish University of Agricultural Sciences, Department of Operational Efficiency S-750 07 Uppsala, Sweden |
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| Abstract: | Alterations to some soil physical parameters were evaluatedafter passes by a tracked forest machine and a wheeled one ofequal mass (about 20 000 kg). Measurements were made after arange of machine passes, with a maximum of eight. The measuredsoil physical parameters were dry bulk density, penetrationresistance, intrinsic air permeability, saturated hydraulicconductivity, porosity and pore-size distribution. Rut depthwas also measured. Although the wheeled machine caused deeper ruts than the trackedone, alterations caused by the two machines to the measuredsoil parameters were similar, except in the uppermost 5–10cm. The wheeled machine caused a decrease in bulk density at5 cm depth, whereas the tracked machine caused an increase,despite its lower ground pressure. |
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