Monday, October 28, 2013

Cambridge Middle School soils class

 Technician Jason Tyrell teaching a class on soil types for the Cambridge City middle school classes today. He showed the students how you can judge the percent of soil particles - clay,silt, or sand - in a particular sample by wetting and feeling the texture of the soil ribbon.
Jason showing the class how different soil types stay in suspension or precipitate out of water.   Sand will do so the fastest, then silt, and clay can take days to precipitate out of suspension.  This is one of the reasons that Wills Creek looks so muddy, as Guernsey county soils contain a high percentage of clay particles.

He also took copies of the Guernsey County Soil Survey, and showed the kids how to read the maps, and what the codes mean.   They liked this part of the class the best.

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