Fig. 6. a. Residual export of solutes obtained by subtracting background concentrations from an upland catchment stream (Fazenda Bonfim). These values were divided by a silicate modification factor (described in text), which eliminates the effects of dilution, increasing basin area, and runoff on solute export. Values are in Mg yr^-1.

b. Residual export of solutes obtained by subtracting background concentrations from an upland catchment stream. These values were divided by a silicate modification factor and are in units of Mg yr^-1.