Lab Assignment #7

In your 1st question, I am not sure what do you refer to by "soil formation". The process of aggregate stability that you described is correct, but aggregate stability is not a soil formation...

Soils formed under coniferous forests are acidic because their debris is acidic and when decomposed various organic acids are released. These acids then enhance mineral weathering (which results in release of Fe & Al ions, which in turn further acidify soils).

Soils at UBC campus under their natural setting tend to be acidic. Soils at the UBC Farm have been in the agricultural production for 50 yrs and since their natural acidity is not suitable for majority of agricultural crops liming is commonly done to raise their pH.

That is valuable! Thank you Maja