AOAC SPADA Meeting

https://en.wikibooks.org/wiki/High_School_Earth_Science/Soils

https://www.ctahr.hawaii.edu/mauisoil/a_profile.aspx

5 Soil forming factors

• Climate – Weather regime • Parent Material – includes bedrock and deposited sediments • Organisms – biota includes bacteria to trees to animals • Relief – topography makes a deference • Time – weathering time not actual