Describe the role of aluminum and its associated ions in soil acidity. Identify the ionic species involved and the effect of these species on the CEC of soils. What is meant by buffering? Why is it so...

Describe the role of aluminum and its associated ions in soil acidity. Identify the ionic species involved and the effect of these species on the CEC of soils.

What is meant by buffering? Why is it so important in soils, and what are the mechanisms by which it occurs? What is acid rain, and why does it seem to have greater impact on forests than on commercial agriculture?