Physical restoration of compacted soils: a lab experiment using rock fragment addition (Comunicazione a convegno)

Type
Label
  • Physical restoration of compacted soils: a lab experiment using rock fragment addition (Comunicazione a convegno) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Alternative label
  • Laura Gargiulo (1), Giacomo Mele (1), Bruno Di Matteo (1) and Fabio Terribile (2) (2014)
    Physical restoration of compacted soils: a lab experiment using rock fragment addition
    in 20th WCSS of Soil Science, Corea, Jeju, 8-13 giugno 2014
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Laura Gargiulo (1), Giacomo Mele (1), Bruno Di Matteo (1) and Fabio Terribile (2) (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) Institute for Agriculture and Forestry in the Mediterranean, National Research Council, Ercolano (NA), Italy (2) Department of Agriculture, University of Naples \"Federico II\", 80055 Portici (NA), Italy (literal)
Titolo
  • Physical restoration of compacted soils: a lab experiment using rock fragment addition (literal)
Abstract
  • In many world areas Alfisol and Entisol soils are susceptible of natural or anthropic deterioration that negatively affects crop yields. Specific geomorphological and climatic conditions can induce, for example, a massive soil structure and problems of asphyxia. We tested an alternative physical restoration method based on the addition of rock fragments performing a lab experiment with repacked soil samples. Five concentrations of 4-8mm rock fragments were added to an Alfisol and an Entisol from South Italy which exhibit problems of natural soil compaction. The mixtures were put in pots (15cm height x 15cm diameter) and after nine wet/dry cycles the samples were impregnated with fluorescent resin. The obtained soil blocks were examined by image analysis techniques. The direct observation and analysis of the soil pore system allowed to quantify the occurred modifications. In both soils the addition of stones improved the soil structure modifying the typical sub-horizontal pore arrangement of the compacted soils into more complex and isotropic ones. This latter amelioration effect gradually increased with depth at increasing rock fragments concentrations. Outcomes of this work demonstrate that lab experimental studies combined with image analysis techniques have the potential to improve the quantitative understanding of the mechanisms of soil structure restoration. Overall results showed that rock fragments addition in compacted soil could be a useful technical structure restoration measure. (literal)
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