ENVS 2060 Lecture Notes - Lecture 2: Aeration, Soil Horizon, Illuvium
26 Jul 2020
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Document Summary
This chapter will teach about soil texture, structure, solar, horizons. Learning to use munsell coding for soil. Can be used to differentiate soils and provide clues to characteristics and conditions. Dark colour of surface layer reflects accumulated organic matter. Red/brown rust represents iron in oxidized or ferric state (important for plant health) due to being well aerated. Dull blue/gray mean means lack of aeration and probably saturated in water (more then 25% water and less then 25% air) Mottles: patches of red/brown in general light brown soil. Indicated soil is wet most of the time. Soil colour is identified by the hue, value and chroma of the soil. Munsell colour chart: consists of color chips that are identified by a code. Code system gives more precise identification when chart it uses. Soil separates is used to describe solid mineral fraction, in particular the size range of the mineral particles. Sandy soils are composed of coarse particles.
