Chapter 7. Soil Aeration and Temperature (*: Important Concept)

Soil Science Chapter 7. Soil aeration and temperature (*: important concept) Zueng-Sang Chen (陳尊賢) Tel: 2369-8349, [email protected]; http://Lab.ac.ntu.edu.tw/soilsc/ Printed on Nov 10, 2004

7.2 Means of characterizing soil aeration in three ways (p274)  Anaerobic and aerobic

7.3 Oxidation-Reduction (Redox) potential  *Oxidized and reduced forms of elements in soil (Table 7.1, p279)  7.4 *Factors affecting soil aeration 

7.6 *Aeration related to soil and plant management  *tree and lawn management (Fig 7.12, p287)

7.7 *Wetlands and poor aerated soils (Fig 8.14, p334)  *definition of wetlands  *definition of hydric soils and indicators (Box 7.1, p292)

7.8 **Process affected by soil temperature (Fig 7.18, p295)  microbial processes and biological zero (5 degree C)  *permafrost soils in Alaska  soil heating by fire

7.10 Thermal properties of soil  **soil temperature distribution in profile (Fig 7.30, p308)  **soil temperature regime in different elevation of Taiwan  <600m, >22C, hyperthermic; 600-1500m, 15-22C, thermic; 1500-3000m, 8-15C, mesic, >3000m, 0- 8C, cryic)

7.11 Soil temperature control  *Organic mulching and plant residue management  Plastic mulches  Moisture control