ENVB 210 Lecture Notes - Lecture 22: Soil Health, Soil Retrogression And Degradation, Soil Horizon
7 Feb 2018
School
Department
Course
Professor
Document Summary
Moisture and heat transfer: in the summer, amount of heat from the sun is high. Dry, cool soil less heat being transferred. Moist soils can transfer the heat (water conducts heat). Heat moving down through soil profile: soil can flip and radiate heat during winter time. Early fall angle of sun changed not as much heat coming in radiation from the soil starts. Less heat radiated from dry soil, more from wet soil. Winter: mulch keeping heat in (acts like a double window). Soils = moderators of heat, maintain temperatures. Microclimates are critical to a lot of processes. Wet soils tend to get less hot and less cold than dry soils (moderation) Plants reduce the radiation hitting the ground, shades the soil. Higher ground temperatures on slopes facing south: drier conditions alter plant growth, microbial activity. North facing slopes have more moisture, are cooler, allow trees to grow shades increase moistures positive feedback.
