
TY  - JOUR
A1  - Menzies, NW 
A1  - Bell, LC 
A1  - Edwards, DG 
T1  - Exchange and solution phase chemistry of acid, highly weathered soils .I. Investigation of mechanisms controlling Al release into solution
JF  - Soil Research
JO  - Soil Res.
Y1  - 1994
VL  - 32
IS  - 2
SP  - 269
EP  - 283
KW  - Soil Solution;Aluminum Solubility;Gibbsite;Jurbanite;
UR  - https://doi.org/10.1071/SR9940269 
N2  - Soil solid phase and soil solution characteristics were evaluated on surface and subsoil horizons of 60 acid, highly weathered soils in the unamended state, and on a subset of 39 surface horizons following the addition of CaSO4.2H2O. The activity of Al3+ Was found to be strongly correlated with the soil solution pH, with Al3+ activity increasing as pH decreased. For surface soils in the unamended state, and for the majority of subsoils, the Al3+ activity calculated was comparable to the theoretical activity supported by the dissolution of gibbsite (Al2O3.3H2O). The Al3+ activity in CaSO4.2H2O-amended samples tended to fall below that maintained by gibbsite dissolution and was more closely correlated with the Al3+ activity supported by the dissolution of jurbanite (AlSO4 (OH).5H2O). 
ER  -

