Compost-induced improvements of soil physical properties in agricultural fields on loess
2013
Eden, Marie | Paradelo, Remigio | Mercier, Vincent | Labat, Christophe | Keller, Thomas | Defossez, Pauline | Houot, Sabine | Environnement et Grandes Cultures (EGC) ; Institut National de la Recherche Agronomique (INRA)-AgroParisTech | Agroscope | Écologie fonctionnelle et physique de l'environnement (EPHYSE) ; Institut National de la Recherche Agronomique (INRA)
The objective of this study was to investigate the impact of three types of compost on soil physical properties of a silt loam in a long-term experiment . Soil organic carbon (SOC) was measured every other year and moisture content was monitored since 2005; consistency limits were determined on samples taken 15 years after the start of the experiment. SOC continuously increased in the amended plots, while it remained stable or decreased in the control plots. Bulk density (ρb) increased (and correspondingly, available pore space decreased) in the control plots. The consistency limits were higher in the amended plots; for two treatments the change at the plastic limit was significant, compared to the control. In this paper, the influe nce of SOC on consistency limits and moisture conditions and retention will be highlighted with regard to soil workability.
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