toposequencetopsoiltorrandstorrertstorrictorroxtortuositytortuosity factortotal potentialtotal potential of soil watertotal pressuretoxicitytrace elementstraffic pantransitional soiltransported soiltrash farmingtree tip moundtree tip pittriaxial shear testtrioctahedraltropeptstruncatedtufftundratundra soils
