ENV100H1 Lecture Notes - Lecture 24: Aeration, Nitrogen Fixation, Nitrification

• School: UTSG
• Department: School of Environment
• Course: ENV100H1
• Professor: Monika Havelka

Document Summary

Carbon balance; carbon in, carbon out big part of climate. Soil is complex: omineral component omatter, water, gases ofoundation of terrestrial life odecaying material odead/living ocomplex median that forms the base of terrestrial media. Soil formation starts with bedrock oparent material=base of geological material of soil obedrock =continuous mass of solid rock (the eath"s crust) oregolith: broken down rock or sediment (mineral bases of soil) Physical: no chemical changes in parent material (wind, rain, thermal, water freezing) o2. Chemical: substances chemically breakdown parent material (water and gases) o3. Biological: organisms breakdown rock (tree roots and licken) Pressure release: parts of rock popup (common in icy areas that have retreated) Karst: dissolution of layers (form of limestone) olimestone is subseptable to acid osalt weathering obiological weathering: lickens start to breakdown rock is the beginning of soil formation o. Soil formation is very slow: factors that affect soil formation o1. parent material composition: (mineral content) o2.