DGT (diffusive gradients in thinfilms)
technique (Zhang et al., 2001) measures the diffusive flux
of labile metal and the kinetic exchange between solid phase and
solution utilizing a simple device that contains a gel resin layer
(Chelex for metals) as a sink of potentially labile pools. It has been
revealed to be a good surrogate of plant uptake (Davison et al.,
2000; Ernstberger et al., 2005; Nolan et al., 2005).
In certain kinetic approaches, there is an effort to provide a useful
tool in order to identify whether metal availability is under the