Aggregate lab data for the PEWAMO soil series. This aggregation is based on all pedons with a current taxon name of PEWAMO, and applied along 1-cm thick depth slices. Solid lines are the slice-wise median, bounded on either side by the interval defined by the slice-wise 5th and 95th percentiles. The median is the value that splits the data in half. Five percent of the data are less than the 5th percentile, and five percent of the data are greater than the 95th percentile. Values along the right hand side y-axis describe the proportion of pedon data that contribute to aggregate values at this depth. For example, a value of "90%" at 25cm means that 90% of the pedons correlated to PEWAMO were used in the calculation. Source: KSSL snapshot (updated 2020-03-13). Methods used to assemble the KSSL snapshot used by SoilWeb / SDE
Pedons used in the lab summary:
Monthly water balance estimated using a leaky-bucket style model for the PEWAMO soil series. Monthly precipitation (PPT) and potential evapotranspiration (PET) have been estimated from the 50th percentile of gridded values (PRISM 1981-2010) overlapping with the extent of SSURGO map units containing each series as a major component. Monthly PET values were estimated using the method of Thornthwaite (1948). These (and other) climatic parameters are calculated with each SSURGO refresh and provided by the fetchOSD function of the soilDB package. Representative water storage values (“AWC” in the figures) were derived from SSURGO by taking the 50th percentile of profile-total water storage (sum[awc_r * horizon thickness]) for each soil series. Note that this representation of “water storage” is based on the average ability of most plants to extract soil water between 15 bar (“permanent wilting point”) and 1/3 bar (“field capacity”) matric potential. Soil moisture state can be roughly interpreted as “dry” when storage is depleted, “moist” when storage is between 0mm and AWC, and “wet” when there is a surplus. Clearly there are a lot of assumptions baked into this kind of monthly water balance. This is still a work in progress.
Siblings are those soil series that occur together in map units, in this case with the PEWAMO series. Sketches are arranged according to their subgroup-level taxonomic structure. Source: SSURGO snapshot (updated 2024-10-24), parsed OSD records (updated 2025-02-20) and snapshot of SC database (updated 2025-02-20).
Select annual climate data summaries for the PEWAMO series and siblings. Series are sorted according to hierarchical clustering of median values. Source: SSURGO map unit geometry and 1981-2010, 800m PRISM data (updated 2024-10-23).
Geomorphic description summaries for the PEWAMO series and siblings. Series are sorted according to hierarchical clustering of proportions and relative hydrologic position within an idealized landform (e.g. top to bottom). Most soil series (SSURGO components) are associated with a hillslope position and one or more landform-specific positions: hills, mountain slopes, terraces, and/or flats. Proportions can be interpreted as an aggregate representation of geomorphic membership. The values printed to the left (number of component records) and right (Shannon entropy) of stacked bars can be used to judge the reliability of trends. Small Shannon entropy values suggest relatively consistent geomorphic association, while larger values suggest lack thereof. Source: SSURGO component records (updated 2024-10-23).
There are insufficient data to create the 3D mountains figure.
Soil series competing with PEWAMO share the same family level classification in Soil Taxonomy. Source: parsed OSD records (updated 2025-02-20) and snapshot of the SC database (updated 2025-02-20).
Select annual climate data summaries for the PEWAMO series and competing. Series are sorted according to hierarchical clustering of median values. Source: SSURGO map unit geometry and 1981-2010, 800m PRISM data (updated 2024-10-23).
Geomorphic description summaries for the PEWAMO series and competing. Series are sorted according to hierarchical clustering of proportions and relative hydrologic position within an idealized landform (e.g. top to bottom). Proportions can be interpreted as an aggregate representation of geomorphic membership. Most soil series (SSURGO components) are associated with a hillslope position and one or more landform-specific positions: hills, mountain slopes, terraces, and/or flats. The values printed to the left (number of component records) and right (Shannon entropy) of stacked bars can be used to judge the reliability of trends. Shannon entropy values close to 0 represent soil series with relatively consistent geomorphic association, while values close to 1 suggest lack thereof. Source: SSURGO component records (updated 2024-10-23).
There are insufficient data to create the 3D mountains figure.
There are insufficient data to create the 3D terrace figure.
Soil series sharing subgroup-level classification with PEWAMO, arranged according to family differentiae. Hovering over a series name will print full classification and a small sketch from the OSD. Source: snapshot of SC database (updated 2025-02-20).
Click a link below to display the diagram. Note that these diagrams may be from multiple survey areas.
Pattern of soils and parent material in the Blount-Pewamo-Glynwood association (Soil Survey of Delaware County, Indiana).
Pattern of soils and parent material in the Blount-Pewamo map unit (Soil Survey of Adams County, Indiana; 1986).
Pattern of soils and parent material in the Glynwood-Blount map unit (Soil Survey of Adams County, Indiana; 1986).
Typical pattern of soils and underlying material in the Blount-Pewamo-Glynwood map unit (Soil Survey of DeKalb County, Indiana; 1982).
Relationship of soils to topography and underlying materials in the Blount-Pewamo association (Soil Survey of Elkhart County, Indiana; 1974).
Pattern of soils and parent material in the Pewamo-Blount map unit (Soil Survey of Grant County, Indiana; 1988).
Pattern of soils and parent material in the Glynwood-Morley map unit (Soil Survey of Grant County, Indiana; 1988).
Pattern of soils and parent material in the Pewamo-Glynwood-Blount map unit (Soil Survey of Grant County, Indiana; 1988).
Relationship of soils to topography and underlying materials in the Blount-Pewamo map unit (Soil Survey of Huntington County, Indiana; 1982).
Morley-Blount-Pewamo and Elliott-Markham-Pewamo soil assocations (Soil Survey of Lake County, Indiana; 1972).
Pattern of soils and parent material in the Glynwood-Morley-Blount map unit (Soil Survey of Steuben County, Indiana; 1981).
Pattern of soils and underlying material in the Blount-Pewamo-Glynwood map unit (Soil Survey of Wabash County, Indiana; 1983).
Pattern of soils and underlying material in the Pewamo-Selfridge-Blount association (Soil Survey of Monroe County, Michigan; November 1981).
Typical pattern of soils and parent material in the Blount-Glynwood-Pewamo general soil map unit (Soil Survey of Allen County, Ohio; 2005).
Typical pattern of soils and parent material in the Pewamo-Bennington association (Soil Survey of Erie County, Ohio; 2006).
Typical pattern of soils and parent material in the Bennington-Cardington-Pewamo association (Soil Survey of Fairfield County, Ohio; 2005).
Typical pattern of soils and parent material in the Blount-Glynwood-Pewamo association (Soil Survey of Hancock County, Ohio; 2006).
A schematic drawing showing the relationship of the soils of the Montgomery-Blount association to other soils of the county (Soil Survey of Allen County, Ohio; August 1965).
A schematic drawing that shows the relief of the Blount and Pewamo soils of association 3 (Soil Survey of Allen County, Ohio; August 1965).
Typical pattern of soils and parent material in the Blount-Glynwood-Pewamo association (Soil Survey of Darke County, Ohio; August 1987).
Typical pattern of soils in the Blount-Glynwood-Pewamo Association (Soil Survey of Defiance County, Ohio; July 1984).
Major soils in the Bennington-Pewamo-Cardington soil association and their underlying material (Soil Survey of Delaware County, Ohio; July 1969).
Map units containing PEWAMO as a major component. Limited to 250 records.
Approximate geographic distribution of the PEWAMO soil series. To learn more about how this distribution was mapped, or to compare this soil series extent to others, use the Series Extent Explorer (SEE) application. Source: generalization of SSURGO geometry (updated 2024-10-30).