Abstract:
Incubation experiment was conducted to obtain infomiation on tlie extent of acidity developed due to added AlCI, (0, 25, 50 and 100 tig g ') at different pH levels and changes in exchangeable A1 in peat. Results showed that A1 at high pH is hydrolysed causing an increased acidity by releasing H* from hydroxy aluminium compounds. Concentration of exchangeable A! is tremendously reduced with increasing pH possibly due to formation of mono-aluminium compounds or polynuclcar complexes of hydroxy aluminium. Extractable Al in IM KCI was very low Ix-cause of the presence of organic binding sites in peat. Thus, the recovery of exchangeable Al from Fisoii peat (I) containing more humified material was extremely low (1.0-2.1%) in comparison to Re^i Mo,‘?s peat (47.6-52.8%).
