02026naa a2200313 a 450000100080000000500110000800800410001910000170006024001280007724501160020526000090032152010740033065000240140465000130142865000150144165300160145665300140147265300190148665300130150565300150151865300290153365300120156265300130157465300150158765300130160270000150161570000150163077300670164510760771996-02-27       1992    bl ---       0--  u    #d1 aALBRECHT, A.  aEffets de la matiere organique sur la stabilite structurale et la detachabilite d'un vertisol et d'un ferrisol (martinique)  aEffects of soil organic matter on soil stability and soil detachment for a vertisol and a ferrisol (Martinique)  c1992  aFor two soil types (vertisol and ferrallitic soil), two land management - either marker gardening or pastures - involved the differentiationof organic status in quantity and quality. Soil structural stability was affected. By two experimental approaches, in the laboratory and on the field using rainfall simulation,it was displayed the positive effect of soil organic matter on soil aggregation and the decreasing of soil detachment. Ferrisol had a better stability than vertisol. Soil organic matter which was responsible for the increase of soil stability was colloidal organic matter linked with clay particles. This organic matter permitted the development of medium-sized soil aggregates (5-200um) for the vertisol and largest aggregate (&gt200um) for the ferrisol. consequently,it was observed, for the situations with high organic content, a sensible decreasing: 1. of soil dispersability detected with the laboratory method and 2.of soil detachment detected with the field method (rainfall simulation). Field results had a good fit with the laboratory results.  asoil organic matter  aPastagem  aVertissolo  aAggregation  aAgregacao  achuva simulada  aFerrisol  aFerrissolo  aMateria organica do solo  aPasture  aRainfall  aSimulation  aVertisol1 aRANGON, L.1 aBARRET, P.  tCahiers - Orston, Serie Pedologiegv.27, n.1, p.121-133, 1992.