Official Series Description


Lab Data Summary

Aggregate lab data for the GRETTUM soil series. This aggregation is based on all pedons with a current taxon name of GRETTUM, 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 GRETTUM were used in the calculation. Source: KSSL snapshot . Methods used to assemble the KSSL snapshot used by SoilWeb / SDE

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Pedons used in the lab summary:

MLRALab IDPedon IDTaxonnameCINSSL / NASIS ReportsLink To SoilWeb GMap
91B93P0459S1992WI013002Grettum6Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties45.8175011,-92.3397217
91B93P0463S1992WI013007Grettum6Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties45.8119431,-92.2261124
91B93P0466S1992WI013011Grettum6Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties45.8230553,-92.3125

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the GRETTUM 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.

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Sibling Summary

Siblings are those soil series that occur together in map units, in this case with the GRETTUM series. Sketches are arranged according to their subgroup-level taxonomic structure. Source: SSURGO snapshot , parsed OSD records and snapshot of SC database .

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Select annual climate data summaries for the GRETTUM series and siblings. Series are sorted according to hierarchical clustering of median values. Source: SSURGO map unit geometry and 1981-2010, 800m PRISM data .

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Geomorphic description summaries for the GRETTUM 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 .

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There are insufficient data to create the 3D mountains figure.

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Competing Series

Soil series competing with GRETTUM share the same family level classification in Soil Taxonomy. Source: parsed OSD records and snapshot of the SC database .

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Select annual climate data summaries for the GRETTUM series and competing. Series are sorted according to hierarchical clustering of median values. Source: SSURGO map unit geometry and 1981-2010, 800m PRISM data .

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Geomorphic description summaries for the GRETTUM 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 .

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There are insufficient data to create the 3D mountains figure.

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Click the image to view it full size.

Soil series sharing subgroup-level classification with GRETTUM, 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 .

Block Diagrams

No block diagrams are available.

Map Units

Map units containing GRETTUM as a major component. Limited to 250 records.

Map Unit Name Symbol Map Unit Area (ac) Map Unit Key National Map Unit Symbol Soil Survey Area Publication Date Map Scale
Graycalm-Grettum complex, 1 to 8 percent slopesB78B13232653436sfxxmn00719911:24000
Graycalm-Grettum complex, 1 to 8 percent slopesB78B11482653437sfxxmn02919931:20000
Wurtsmith-Grettum complex, 0 to 3 percent slopesC44A43116734891t5djmn06520061:12000
Wurtsmith-Grettum complex, 0 to 3 percent slopesC44A9216763901t8f3mn09520061:12000
Graycalm-Grettum complex, 1 to 8 percent slopesB78B108352943773sfxxmn62520151:24000
Grettum loamy sand, 0 to 6 percent slopes3448B22594448434h1mmwi01320041:12000
Grettum loamy sand, 6 to 12 percent slopes3448C8010448436h1mpwi01320041:12000
Karlsborg-Grettum-Perida complex, 6 to 12 percent slopes495C4328448568h1rywi01320041:12000
Karlsborg-Grettum-Perida complex, 12 to 30 percent slopes495D3082448571h1s1wi01320041:12000
Karlsborg-Grettum-Perida complex, 1 to 6 percent slopes495B2785448561h1rqwi01320041:12000
Grettum loamy sand, 0 to 6 percent slopes3448B245781250v6ymwi03120051:12000
Grettum loamy sand, 6 to 12 percent slopes3448C36781251v6ynwi03120051:12000
Karlsborg-Grettum-Perida complex, 6 to 12 percent slopes495C18781290v6zxwi03120051:12000
Karlsborg-Grettum-Perida complex, 1 to 6 percent slopes495B16781289v6zwwi03120051:12000
Grettum loamy sand, 0 to 6 percent slopes3448B85524276452mh54wi09519781:15840
Centuria-Grettum-Trade River complex, 0 to 4 percent slopes, stony13B1324277012mh6ywi09519781:15840
Grettum loamy sand, 0 to 6 percent slopes3448B10373723608s8z6wi12920021:12000
Grettum loamy sand, 6 to 12 percent slopes3448C610723609s8z7wi12920021:12000
Karlsborg-Grettum-Perida complex, 1 to 6 percent slopes495B368449006h272wi12920021:12000
Karlsborg-Grettum-Perida complex, 6 to 12 percent slopes495C333449007h273wi12920021:12000
Karlsborg-Grettum-Perida complex, 12 to 30 percent slopes495D265449008h274wi12920021:12000

Map of Series Extent

Approximate geographic distribution of the GRETTUM 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 .