Official Series Description


Lab Data Summary

Aggregate lab data for the DREWS soil series. This aggregation is based on all pedons with a current taxon name of DREWS, 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 DREWS 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
2179P0426S1979OR037002DREWS7Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties42.1806831,-120.6474609
2116N0298S2015OR037006Drews7Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties42.20735,-120.354407

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the DREWS 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 DREWS 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 DREWS 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 DREWS 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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There are insufficient data to create the 3D flats position figure.

Competing Series

Soil series competing with DREWS 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 DREWS 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 DREWS 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 flats position figure.

Soil series sharing subgroup-level classification with DREWS, 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

Click a link below to display the diagram. Note that these diagrams may be from multiple survey areas.

  1. OR-2012-05-10-20 | Lake County, Southern Part - 1999

    Soil-landscape relationships in Goose Lake Valley. Goose Lake and Lakeview soils on basin floor, Drews soils on middle terraces, Salisbury and Oxwall soils on high terraces, and Booth soils on hills (Soil Survey of Lake County Oregon, Southern Part; 1999).

Map Units

Map units containing DREWS 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
Drews clay loam, 2 to 5 percent slopes1371838486412jb4qca60319741:24000
Drews gravelly loam, 0 to 9 percent slopes1351178486410jb4nca60319741:24000
Drews clay loam, wet, 0 to 2 percent slopes1381035486413jb4rca60319741:24000
Drews loam, 0 to 5 percent slopes, goose lake valley, southern part, mlra 2113410134864092wzs9ca60319741:24000
Drews gravelly loam, 15 to 30 percent slopes136190486411jb4pca60319741:24000
Drews loam, 0 to 5 percent slopes, goose lake valley, northern part, mlra 2173Bor12029247052wzs8ca60319741:24000
Drews loam, 0 to 5 percent slopes, goose lake valley, northern part, mlra 2173Bor12018994262wzs8ca70319831:24000
Drews clay loam, 2 to 5 percent slopes137ma28189743321pfjca70319831:24000
Drews gravelly loam, 0 to 9 percent slopes135ma22189743121pfgca70319831:24000
Drews loam, 0 to 5 percent slopes, goose lake valley, northern part, mlra 2173B194004894322wzs8or63619911:24000
Drews loam, 5 to 15 percent slopes73C4702489433jf95or63619911:24000
Drews loam, 15 to 30 percent slopes73E3605489434jf96or63619911:24000
Drews cobbly loam, 5 to 15 percent slopes74C634489435jf97or63619911:24000
Drews-Oxwall complex, 0 to 5 percent slopes75B417489437jf99or63619911:24000

Map of Series Extent

Approximate geographic distribution of the DREWS 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 .