GGR100H1 Lecture : soils
Document Summary
Pedogenic processes (internal: ground water can come upwards. Translocation: eluviation: downward transport of fine particles from the ae horizon. External controls on pedogenesis: climate, vegetation, parent material/local geology, relief/topography, time, drainage is important. Climate: more water= more leeching, the more rain you have, you will have bigger differences between the horizons, hotter temperature = increased chemical reactions. Tree bark is more resistant (more fibrous) to decomposition than grasses: grassland soils have deep organic trasloation, coniferious needles -> acid soils. Parent material: minerals vary in their resistance to weathering, rocks vary in their chemical composition, texture of unconsolidated sediments. Relief www. notesolution. com: soils developing on slopes usually fall down the hill because of gravity, lower parts of the hill have thicker and better soil, aspect referes to the compass direction your slope is facing, slopes affect drainage. Time: soils take a long time to develop, especially in cold regions, younger soils tend to be thinner and have less pronounced horizonation.
