An illuvial accumulation of humus and iron hydrous oxides. Soil with a strongly developed O horizon. A thick, dark-colored epipedon with high base saturation. True and False. Write the word true or false in the blank next to each statement.
Iron oxides attract more anions under slightly acidic conditions than under basic conditions.
A soil in the soil compatibility subclass VIe is well suited for cultivation and growing corn. Coulombic or electrostatic forces are responsible for the adsorption of nonpolar hydrophobic organic compounds to clay surfaces and organic matter. Hydrophobic sorption of an organic compound to soil organic matter is driven by favorable changes in entropy when the organic chemical leaves the aqueous phase. A soil classified as a Hapludalf can be commonly found in Arizona. Cation exchange reactions are the reversible, low-energy transfer of cations between solid and liquid phases.