Mineral Soil 3 : Soil with little organic matter. Organic soils and organic soil layers can burn. Organic soil layers are often found above mineral soil layers, such as humus layers of decayed leaves in forests ecotypes
The Virginia Department of Forestry VDOF, Glossary, Forest Protection and Fire Prevention, Department of Forestry Central Office, Fontaine Research Park, Charlottesville, Virginia, USA 2012. http://www.dof.virginia.gov/fire/glossary.shtml, (For Fr - Amer) {481}