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Related to exch: foreign exchange, exchanges


1. exchange.
2. exchequer.
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The smallest concentrations of Co were found in the EXCH fraction, whilst the largest concentrations of Co in most soils were associated with the RES, FeAM and FeCR fractions.
Mean proportions of Mn decreased in the order: RES [approximately equals] FeAM [is greater than] MnOX [is greater than] FeCR [is greater than] ORG [approximately equals] EXCH.
For both Co and Mn, the smallest proportions of these elements were found in the EXCH fraction (Figs 3 and 4), ranging from 0.