Relative proportion of Zn species at points of interest on coated fertilizer granules incubated in soil and unexposed coated fertilizer granules determined by linear combination fittings of x-ray absorption fine structure (XAFS) spectra.

a χ2red (reduced chi square) = [Σ(fit—data)2 / σ2]/(Ndata—Ncomponents-1), where σ2 is the known variance of fits, Ndatais the number of data points and Ncomponents is the number of components in the fit. As indicated, reduced chi square (χ2red) reported by the Athena software is a measure of the sum of squares of the final misfits (see Athena Users’ Manual for details).Relative proportion of Zn species at points of interest on coated fertilizer granules incubated in soil and unexposed coated fertilizer granules determined by linear combination fittings of x-ray absorption fine structure (XAFS) spectra.