(original) (raw)

Ca 2+ K + Na + K + K + Mg 2+ Ca 2+ Ca 2+ Ca 2+ - - - - - - - - - - - - Soil particle Ca 2+ Mg 2+ Ca 2+ Na + K + - - permanent charge Ca 2+ K + Na + K + K + Ca 2+ Ca 2+ Ca 2+ Ca 2+ - - - - - - - - - - - - Mg 2+ Mg 2+ Ca 2+ Na + K + - - Soil particle