EFFECTS OF SIMULATED ACID-RAIN ON THE DYN AMICS OF ALUMINUM IN AN ACID FOREST SOIL .2. MOBILITY OF MINERAL ALUMINUM COMPOUNDS IN THE SOIL

The effects of simulated acid rain on the aluminium of soil minerals w ere evaluated. The acid rain had no effects on either the crystalline or amorphous aluminium oxides present on the surface or on those withi n clay minerals. The soil therefore showed a good buffering power as r egards the mineral forms of the tested acid solutions. However, the pr evalence of amorphous oxides over crystalline oxides and of quartz ove r phyllosilicates is an index of the precarious equilibrium of the soi l at the time of sampling.