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Soil Forming Factors

저작시기 2007.10 |등록일 2009.12.30 파워포인트파일MS 파워포인트 (ppt) | 20페이지 | 가격 900원

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Soil Forming Factors
Soil Forming Factors
Parent Rock
Climate
Climate-Rainfall
Climate-Rainfall
Climate-Rainfall
Climate-Rainfall
Climate-Rainfall
Climate-Average Annual Temperature
Climate-Salinization
Climate-Salinization
Rates of Plant Growth and Decay
Rates of Plant Growth and Decay
Slope Aspect and Steepness
Slope Aspect and Steepness
Slope Aspect and Steepness
Time
Soil Transport
THE END

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Soil Forming Factors
Parent Rock
Climate
Rates of Plant Growth and Decay
Slope Aspect and Steepness
Time
Soil Transport
Parent Rock
Texture and composition of soil depends on it
Granite
Feldspar clay
Quartz sand grain
Sandy soil forms when clay is leached(침출) into the B horizon
Basalt
Absent of quartz
Soil is rich in clay but not in sand
Nutrient Dependence
Pure quartz sandstone is absent of nutrient
Climate
A number of factors may pull the water back upward which has been leached downward
Roots
Evaporation at the surface
Capillary action(모세관 현상)
Water is electrically attracted to the soil particle
Water consequently being leached and drawn back again leads to the formation of a number of geologic features
Pedocal, caliche, salinization, pedalfer, laterite, bauxite
Climate-Rainfall
Climate
Name of Feature
Formation Procedure
Arid and Semiarid Regions
Pedocal
(석회토)
1. During rain, rainwater dissolves soluble ions in A horizon (A 층위)
2. Capillary action, evaporation and roots draw back water
3. Many dissolved ions precipitate in B horizon (B 층), forming “pedocal”
Caliche
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