Thaw depth thaw line than clays. Yet another factors are the vegetation and the percentage of the soil organic matter, which influence the bulk density of the soil, and hence thermal conductivity. Thaw depth In soil science, the thaw depth or thaw line is the instantaneous level down to which the soil has warmed to zero degrees celcius. The active layer thickness is the maximum thaw depth over a period of two years. The layer of soil over the thaw depth is called the active layer, while the soil below is called permafrost. The term frost front refers to the varying position
Blandford (soil) Blandford (soil) Blandford soil series is the name given to a loam or sandy loam soil which has developed on glacial till in parts of southern Quebec and northern New England. It belongs to the brown podzolic soil group and occurs in hilly areas of the Green Mountains in Vermont plus the adjoining Sutton Mountains in Quebec. In recent years the USDA has deactivated this series, which remains on active status in Canada. Similar soils on active status in Vermont include Stowe series and Woodstock series. Metamorphic and sedimentary rock underlie the parent material of the Blandford series. Slate, phyllite