ENVS 1126 Chapter : Chapter 11 Soil
Document Summary
Mixture of mineral soil and humus: e horizon pale-colored layer. Eluvation (don"t need to focus on e: b horizon subsoil. Oxidized metals give reddish or yellow color: c horizon weathered parent material. Bottom (leaf cutting ants bring b and c horizon to the top - a: soil structure, fert, h20 holding, aeration - overwatering kills plants by drowning them. Help plants take in nutrients: degration & erosion, 3 types of erosion to know: the area, splash erosion large raindrops hit soil and particles splash out of, sheet erosion water accumulates and rolls off the land. February 20, 2017: deforestation, erosion causes, overcultivation ex: dryland cultivation farmers in jinan, china, overgrazing livestock graze on grasslands and cleared forests. Norman borlaug (father of green revolution) if mexico and north america joined, they will have food security. Went to mexico to work to increase yield in wheat. Also went to india and pakistan to do the same.
