SOIL SURVEY

-47-Organic Landform sNorco (NA) is the only soilscape group which is associated with organi clandforms (Figure 55) . It occurs on flat bogs and horizontal fens . The material sconsist of 40 to about 130 cm of mesic and fibric organic materials overlying calcareousalluvium . The soils are Terric Mesisols and Terric Fibrisols .SOILSCAPE GROUP DESCRIPTIONS 1This section contains an identification key (Table 6) and generalize ddescriptions ) of the soilscape map units used in this report . The key identifies th esoilscape unit in relation to the soil maps and includes general information on th elandforms, parent materials, soil classification, soil texture and coarse fragments ,drainage and vegetation . The generalized descriptions of the soilscape map unit sinclude some landscape and vegetation information and indicate some of the dominan tsoil qualities of each unit . Some morphological and analytical information from alocation chosen to characterize the map unit is presented in tabular form . Moredetailed analytical information is presented in Appendixes A and B .The descriptions indicate that the soils of Yoho National Park have awide range of soil characteristics that affect soil quality . Soil characteristics refe rto physical and chemical features such as particle size distribution, soil structure ,stoniness, amount of lime, acidity and amount of organic matter . Soil qualitie srefer to the inferred soil properties resulting from various combinations of physica land chemical characteristics and are designated by such terms as erodibility, permeabilityor drainage . Soil limitation means an evaluation of the degree and kind o frisk or impediment that a certain soil (identified on the map as a soilscape map unit )has for a specific, selected Park use . For example : the kind of limitation for acampground may be wetness; the degree of limitation may be severe if the watertabl eis shallower than 50 cm during the season of use . An expanded discussion of soi llimitations is found in Part IV .1 More complete information on profile morphology and other mapping unit parameter scan be obtained from the authors, and will be published as Appendix E in a separatevolume .