ENV100Y5 Lecture 11: L11 Ch7 - Soil Resources
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ENV100Y5 Full Course Notes
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Document Summary
Causes and consequences of soil erosion and degradation. Peat soils formed over 8000 years; up to 6m thick. Carbon balance in peat: primary production stores carbon, decomposition releases carbon. Interdisciplinary research project studying the influence of climate on carbon balance (and vice versa) Mineral matter, organic matter and gases make up soils. Dead/living microorganisms; decaying material is also included. Bacteria, algae, earthworms, insects, mammals, amphibians, and reptiles take the use of soil. Supports plant growth: plants cannot survive without good soil. Parent material base geologic material of soil. Bedrock (cid:272)o(cid:374)ti(cid:374)uous (cid:373)ass of solid ro(cid:272)k (cid:894)the earth(cid:859)s (cid:272)rust(cid:895) Regolith (sediment) broken up rock is found within soil: lunar regolith layer of loose, heterogeneous superficial material covering solid rock which includes dust, soil, and broken rock present on earth and other animals. Physical (mechanical) no chemical changes in parent material. Chemical substances chemically interact with parent material. Biological organisms break down parent material: examples:
