GEOG 125 Lecture Notes - Lecture 5: Neoteny, Pedogenesis, Regolith
Document Summary
Wind, rain, thermal expansion and contraction, water freezing. Mineral matter, organic matter soil air and soil water. Bacteria, algae, fungi earthworms, insects, mammals, amphibians, reptiles. High rates of erosion or deposition will slow, prevent or reverse soil. High rates of erosion or deposition will slow, prevent or reverse soil formation. On 98% of area possible to grow food! <5% of canada is are able (crop production) Cropland: land used to raise plants for sure. Second in parts of asia, mexico, and south america. Malnutritions: shortage of needed nutrients inadequate calories, vitamins and minerals. Main in mdc"s (developed countries) 60% of adults exceed healthy weight. Improving efficency of food production chaning our diets. Soil erosion: a global problem (99% of the worlds food comes from the soil. Erosion, soil compaction, forest removal, overganzzing, salinization, climate changem depletion of water. Affects ~ 1/3 of the planets land area.
