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Use of Sample Data and Seventh Approximation Criteria in Delineating Areas of Similar Soils
Author(s) -
Mausel P. W.,
Runge E. C. A.,
Carmer S. G.
Publication year - 1970
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1970.03615995003400040033x
Subject(s) - soil map , dominance (genetics) , soil water , soil series , soil survey , sample (material) , soil science , geography , physical geography , soil classification , geology , hydrology (agriculture) , geotechnical engineering , biochemistry , chemistry , chromatography , gene
Soil series data, from the Soil and Water Conservation Needs Inventory 2% sample for a nine county study area in east‐central Illinois, were transformed into Seventh Approximation nomenclature at the order, suborder, great group, and subgroup categories. The dominant and second most dominant classes of soil within each sample area, with an indication of the degree of dominance, were plotted on outline maps. Stream locations were placed on the maps before soil boundaries were drawn. Soil regions were delineated by placing boundaries midway between sample areas of a different classification. Analysis of the maps indicates that the resulting subgroup map shows characteristics of soil distribution generally comparable to currently used county soil association maps. The development of this method is not intended to replace traditional methods of map construction in pedologically advanced areas. However, it may be a useful method for constructing accurate soil maps at various selected levels of generalization in areas of the world where soil distribution patterns are unknown or incompletely understood.