Hydro-physical processes and soil properties correlated with origin of soil hydrophobicity

Abstract

ABSTRACT

Soil moisture influences sorptivity and water repellency of topsoil aggregates in native grasslands

“…Hydrophobic compounds that promote changes of soil sorptivity indirectly clearly affect water infiltration processes (Vogelmann et al, 2013a). According to the definition of Philip (1957) the sorptivity expresses the tendency of an intrinsic material to absorb and transmit a liquid by capillarity.…”

“…Some studies have demonstrated that hydrophobicity is a much broader phenomenon than previously assumed (Hallett and Young, 1999;Vogelmann et al, 2012), and highlighted the need to study about its temporal and spatial properties, factors, and impacts of soil hydrophobicity on hydrological cycle. In this context, aggregate behavior in soil matrix is crucial to understanding changes in soil infiltration from fluctuating soil wettability (Ritsema et al, 1998;Vogelmann et al, 2013a).…”

Analyzing and Projecting Soil Moisture and Cone Penetrability Variations in Forest Soils

“…Similarly, decreasing MC PS with increasing OM% relates to increased pore space due to OM-facilitated soil granulation (Han et al, 2006). There is also the possibility of decreasing MC PS due to increasing hydrophobicity as OM-containing soils dry out (Vogelmann et al, 2013). In contrast, the increasing MC PS trend with increasing Sand% may be due to preferential pore space saturation in sandier topsoil portions.…”

Soil hydrophobicity: comparative study of usual determination methods

“…This is a global phenomenon, which affects infiltration as well as soil water retention and plant growth. Hydrophobicity can be responsible for enhanced surface runoff, erosion and preferential flow (VOGELMANN et al, 2013b). Due to this high relevance, a great number of studies have been conducted on possible causes of water repellency and the results point to a variety of factors causing and influencing soil water repellency (SCHAUMANN et al, 2007;DOERR et al, 2007 Records of hydrophobic soils in Brazil are found mainly in areas cultivated with woody species and grasses (VOGELMANN et al, 2013a).…”

“…These substances may be of various origins; most of them derived from local vegetation due to hydrophobic organic compounds in their chemical composition and are released either by deposition or decomposition of plant material (DOERR et al, 2007). Hydrophobicity is found to be related with other factors such as soil moisture (DOERR et al, 2007), pH (MATAIX-SOLERA et al, 2007), soil particle size (VOGELMANN et al 2013b), incidence of fires (VOGELMANN et al, 2012), and presence of some fungi and bacteria species (SCHAUMANN et al, 2007).…”