Geotechnique Magazine
PERMAFROST SOIL. 1. Permafrost within 100 cm of the soil surface 2. Gelic materials within 100 cm of the soil surface and permafrost within 200 cm.
Weathering and Soils
Thomas Obreza Soil and Water Science Dept. Univ. of Florida Soil Fertility and pH.
Weathering and Erosion Natures way of tearing down everything that has been built up over billions of years.
GELISOLS
