@article{fdi:010067442,
  title = {{I}nfluence of organic matter content on hydro-structural properties of constructed technosols},
  author = {{D}eeb, {M}. and {G}rimaldi, {M}ichel and {L}erch, {T}.{Z}. and {P}ando, {A}nne and {P}odwojewski, {P}ascal and {B}louin, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{C}onstructed {T}echnosols may be an alternative for creating urban green spaces. {H}owever, the hydro-structural properties emerging from the assembly of artefacts have never been documented. {T}he soil shrinkage curve ({SSC}) could provide relevant structural information about constructed {T}echnosols, such as the water holding capacity of each pore system (macropores and micropores). {T}he objectives of this study were (i) to evaluate the {SSC} and water retention curve ({WRC}) to describe the structure of constructed {T}echnosols and (ii) to understand the influence of organic matter content on soil hydro-structural properties. {I}n this study, {T}echnosols were obtained by mixing green waste compost ({GWC}) with the material excavated from deep horizons of soil ({EDH}). {T}he {GWC} was mixed with {EDH} in six different volumetric percentages from 0% to 50% ({GWC}/total). {T}he {GWC} and {EDH} exhibited highly divergent hydro-structural properties: the {SSC} was hyperbolic for {GWC} and sigmoid for {EDH}. {A}ll six mixture treatments (0%, 10%, 20%, 30%, 40% and 50% {GWC}) exhibited the classical sigmoid shape, revealing two embedded levels of pore systems. {T}he 20% {GWC} treatment was hydro-structurally similar to the 30% and 40% {GWC} treatments; so, a large quantity of expansive {GWC} is unnecessary. {T}he relation with the {GWC} percentage was a second-degree equation for volumetric available water in micropores, but was linear for volumetric available water in macropores and total volumetric available water. {T}otal volumetric available water in the 50% {GWC} treatment was twice as high as that in the 0% {GWC} treatment. {B}y combining {SSC}s and {WRC}s, increasing the {GWC} percentage increased water holding capacity by decreasing the maximum equivalent size of water-saturated micropores at the shrinkage limit and increasing the maximum equivalent size of water-saturated macropores, resulting in an increased range of pore diameter able to retain available water.},
  keywords = {{FRANCE}},
  booktitle = {},
  journal = {{P}edosphere},
  volume = {26},
  numero = {4},
  pages = {486--498},
  ISSN = {1002-0160},
  year = {2016},
  DOI = {10.1016/{S}1002-0160(15)60059-5},
  URL = {https://www.documentation.ird.fr/hor/fdi:010067442},
}