Fluvisols have moved down in the key to be the second last RSG. The Umbrisols
are now placed directly after Phaeozems. The following RSGs switched their
positions: Solonetz and Vertisols, Durisols and Gypsisols, Cambisols and
Arenosols. The soils characterized by an argic horizon now have the following
order: Acrisols – Lixisols – Alisols – Luvisols.