The Acrisols of the WRB 2022 key (Ch 4, p. 119): an argic horizon starting \(\le\) 100 cm from the mineral soil surface; a CEC (1 M NH4OAc, pH 7) of < 24 cmolc/kg clay in some subhorizon of the argic horizon within 150 cm of the mineral soil surface; and exchangeable Al > exchangeable (Ca+Mg+K+Na) in half or more of 50-100 cm from the mineral soil surface, or of the lower half of the mineral soil above a limiting layer starting \(\le\) 100 cm, whichever is shallower. Where the cations are not available, the pH is read by WRB 2022 Annex 2, Table 9.3.
Arguments
- pedon
A
PedonRecord.- max_cec
CEC per kg clay below which the clay is of low activity (default 24).
- max_bs
Unused since v0.9.310 (WRB 2022 does not use the base saturation here), kept so that existing calls still run.