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Journal of soil science and plant nutrition

versão On-line ISSN 0718-9516

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CUEVAS, J; HORN, R; SEGUEL, O  e  DORNER, J. Hydraulic conductivity variation in chilean volcanic soils due to wheeling and management. J. Soil Sci. Plant Nutr. [online]. 2013, vol.13, n.3, pp.756-766.  Epub 27-Ago-2013. ISSN 0718-9516.  http://dx.doi.org/10.4067/S0718-95162013005000060.

To describe the effect of wheeling on saturated hydraulic conductivity (ks), undisturbed soil samples from an Andisol were collected at three depths In Chilean soil classification system Andisols are defined as Malihue at the 2 sites minor and mayor mechanical stresses were applied repeatedly and the hydraulic properties determined for all depths. The saturated hydraulic conductivity Ks was reduced due to wheeling but the magnitude depended on the speed and load during wheeling. In addition, also the pore size distribution was reduced both in total but also in size classes. Smaller values of Ks were observed in Site 2 where low speed and low tire inflation pressure were applied, while the traffic induces a reduction of the pore associated to a reduced functionality of the porous system. To assess these qualitative changes and soil behaviour, measurements like hydraulic conductivity (ks) are a good tool to describe the physical quality of a soil.

Palavras-chave : Volcanic ash soil; hydraulic conductivity; soil porosity.

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