SCSC 301 Lecture Notes - Lecture 3: Alkalinity, Parent Material, Soil Texture
24 Feb 2017
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Rock: all others (oxygen, silica, calcium, magnesium, potassium: surface vs subsoil i. ii. Subsurface: silica, iron, aluminum, and magnesium (accumulation of clay: coarse vs fine i. ii. Plasticity: high: organic matter moderate to high moderate to high low (with the exception of humus- high) i. ii. iii. iv. v. high. Plasticity: low very high very high: sesquioxides (iron and aluminum oxides and hydroxides) i. ii. iii. iv. v. Plasticity: moderate: amorphous materials very low very low i. ii. iii. iv. v. variable. It will be a dynamic equilibrium for each of the cations for each soil. 1 cmol= cg (molecular weight) / charge (valence) Mole charge = 1g/44g *2 cmol= mol charge* 100 cmol/mol: construct equations for . =5 cmol charge/kg: determining the amount of exchangeable bases per kg of soil: If it comes out lighter or clear that ion has been absorbed in the soil. If positive ion is absorbed it is a negative soil and has cec.
