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This issue's cover: Transmission electron microscope (TEM) image (50 000X magnification) of a mixture of Fe- and Al-oxide minerals: hexagonal gibbsite [-Al(OH)₃] platelets and aggregated, lathe-shaped goethite (-FeOOH) particles. Iron- and Al-oxides are considered the most important minerals for retaining PO₄ in soils, but their relative importance as they coexist in soils is unclear. Khare et al., "XANES determination of adsorbed phosphate distribution between ferrihydrite and boehmite in mixtures", p. 460-469, untilized X-ray absorption spectroscopy to quantify how PO₄ distributes itself between Fe- and Al-oxides in a mixture to estimate the relative affinity of each mineral for PO₄.