Hydromophic soils of two inland valley swamps in the rain forest zone of Nigeria. II clay minerawgy and pedogenic processes

Abstract

The Clay mineralogy and pedogenic processes in soil of two inland va/Jey swamps were investigated. Both field morphologic observations and particle size distribution indicate /ithologic discontinues in only two (pedons AB-2 and AB-5) of the nine pedons studied. Clay minera/Ogy was predominantly kaolinitic except in pedons BD-1 and BD-2 which contained some degraded mica minerals. Ferro/ysis was well demonstrated in pedons BD-1 and BD-2. Decomposition processes of minerals Jed to the fonnation of some degraded mica.

Keywords: clay, ferrolysis, kaolinite