As an extension, students can test infiltration rate, pH level, and for the presence of nutrients such as nitrogen, potassium, and phosphorus. Have students look at a soil sample under magnification and describe the organisms they see. As a class, discuss the role of micro-organisms in soils. Then ask them to select, research, and present cases of soil degradation in British Columbia. An awareness of soil structure, soil classification, and the factors that influence soil development and degradation are important to the understanding of a forest ecosystem.
Students can demonstrate their awareness through their involvement in class, lab, and field studies.
Have small groups of students write the evolutionary story of a soil profile. Once the soil profiles are complete, have groups exchange soil profiles and analyse them to determine physical properties and horizons. Ask them to also compare notes on the soil samples and discuss possible interpretations of the soil profiles. Have students explore a local site and create photo essays on soil degradation. Next Page Copyright 1997 All Rights Reserved.