(Article of periodic en Anglais - 2013)

Document title

Soils with fragipans in the USA

Authors(s) and Affiliation(s)

(1) Dep. of Soil Science, Univ. of Wisconsin, Madison, ETATS-UNIS


The AA. examined 362 pedons with fragipans in the Natural Resources Conservation Service (NRCS) SSURGO database and 36 case studies in the USA from the literature. Soils with fragipans are classified primarily at the great-group but also at the subgroup level. Fragipans occur in 4 orders (Alfisols, Ultisols, Inceptisols, Spodosols), 10 suborders, 23 great groups, and 57 subgroups. Although they occur in 28 states in the USA, the most extensive areas of soils with fragipans occur in the southern Mississippi River valley and the central and southern Appalachian Mountains. The genesis of fragipans involves wetting and drying, possibly influenced by the presence of lithologic discontinuities, which lead to hydro-consolidation that causes close-packing of grains and reduces porosity. Although silica may bind clays and Fe oxides and bridge skeletal grains, this property is not recognized in the definition of the fragipan


Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2013, vol. 104 [pp. 233-242]

Bibliographic references : 1 p.

Collation : 2 fig., 4 tabl.



INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2012.11.014

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
Refdoc record number (ud4) : 27624639 : Permanent link - XML version
Powered by Pxxo