ENVIRSC 2B03 Lecture Notes - Lecture 6: Loam, Evapotranspiration, Soil Structure
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It"s (cid:449)etter (cid:374)ear the ste(cid:373)s tha(cid:374) it is a(cid:449)ay fro(cid:373) the(cid:373), (cid:449)hi(cid:272)h is ad(cid:448)a(cid:374)tageous to the plants. Compacted soil = decreased infiltration = lower cumulative infiltration rate. Soil structure and stability of soil structure relates to infiltration. Stability is usually closely related to the amount of organic matter. Figure out the difference between soil texture and soil structure. Pores and soil structure: larger pores = more air, cracks, crevices, macropores (conduct water nicely), unstable soil structure (breaks down more easily) Unstable soil structure = turns muddy after rain, Bare unstable soil, after water drop = wet, soil structure falls apart, landflow, less infiltration (smashed soil structure) Forested system: water smashes into the plants rather than directly on the soil. Stable soil structure = runoff, less available water for plants. Winter: not a lot going on in the soil. How it freezes and how deep it freezes depends on the snow.