GEOB 102 Lecture Notes - Lecture 27: Transpiration, Toyota Electronic Modulated Suspension, Permanent Wilting Point

• School: UBC
• Department: Geographical Biogeosciences
• Course: GEOB 102
• Professor: Gordan Djurdjevic

Document Summary

Geob 102 - our changing environment: climate and ecosystems - lecture 27: soil processes, classification, soil and water. Different orders of soils, subdivided into more categories. Canadian system of soil classification (cssc) was developed to suit its soils, based on soil properties and emphasis on the recognitions of horizons and sub-horizons. Gravitational water: water removed by gravity when soil is saturated. Capillary water: water that resists gravity by clinging to soil particles via capillary tension (available for plants) Hygroscopic water: water strongly attached to very small soil particles. Field capacity: maximum amount of water that a particular soil can hold against gravity. Wilting point: soil water storage level critical for plants; below wilting point there is water, but not available (hygroscopic) Storage capacity: amount of capillary water, available for plant use; depends on soil texture and organic matter: highest storage capacity = fine texture + abundant organic matter.