acid clay

acid clay

[′as·əd ′klā]
(geology)
A type of clay that gives off hydrogen ions when it dissolves in water.
References in periodicals archive ?
But its common name is chalk plant and it is nothing less than cruelty to try to make it grow in our heavy, slightly acid clay.
After 24 hours residence time organo acid clay sample is collected through filtration.
Lime added to acid clays - clay can be both acid and alkaline depending on the garden's location - causes the particles to cluster but there is no point in this if the soil is already chalky or alkaline.