@article{PAR00002205,
  title = {{B}imodal zone of the soil textural triangle : common in tropical and subtropical regions},
  author = {{C}ondappa de, {D}. and {G}alle, {S}ylvie and {D}ewandel, {B}. and {H}averkamp, {R}andel},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {USDA} soil textural triangle shows a zone where sods have a low silt fraction compared with the fractions of sand and day. {T}hese soils have a particle-size distribution function showing two local maxima in weight percentage for the particle-size ranges of sand and clay. {T}he soils are referred to as bimodal soil, with an associated bimodal zone in the soil textural triangle. {I}t was shown that processes of pedogenesis in tropical and subtropical regions favor the generation of bimodal soils. {D}ata from the {M}aheshwaram watershed in {S}outh {I}ndia (subtropical), the {O}ueme watershed in {B}enin (subhumid), and soil databases established for (sub)tropical regions confirmed that bimodal soils are common in (sub)tropical climates. {T}hese results were backed up by the fact that sample populations of bimodal soils are underrepresented in databases such as {UNSODA}, {GRIZZLY}, or the {S}oil {I}nformation {S}ystem of the {N}etherlands, all three of which contain soils mainly from temperate regions. {T}he consequences of bimodal soil behavior are important. {T}he hydrodynamic flow behavior of these soils should be different from that of monomodal soils. {T}he concept of shape similarity between the cumulative particle-size distribution curve and the water retention curve, validated for monomodal soils, implies that bimodal soils should theoretically exhibit bimodal hydraulic properties. {T}hese consequences are far reaching since most of the soil hydraulic models in the literature are monomodal and hence inadequate to describe the hydraulic behavior of bimodal soils from (sub)tropical regions.},
  keywords = {},
  booktitle = {},
  journal = {{S}oil {S}cience {S}ociety of {A}merica {J}ournal},
  volume = {72},
  numero = {1},
  pages = {33--40},
  ISSN = {0361-5995},
  year = {2008},
  DOI = {10.2136/sssaj2006.0343},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00002205},
}