Official Series Description


Lab Data Summary

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

There are insufficient data to create the lab data summary figure.


Water Balance

Monthly water balance estimated using a leaky-bucket style model for the MCWILLAR 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 MCWILLAR 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 MCWILLAR 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 MCWILLAR 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 terrace figure.

There are insufficient data to create the 3D flats position figure.

Competing Series

Soil series competing with MCWILLAR 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 MCWILLAR series and competing. Series are sorted according to hierarchical clustering of median values. Source: SSURGO map unit geometry and 1981-2010, 800m PRISM data .

There are insufficient data to create the annual climate figure.

Geomorphic description summaries for the MCWILLAR 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 hills figure.

Click the image to view it full size.

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

There are insufficient data to create the 3D flats position figure.

Soil series sharing subgroup-level classification with MCWILLAR, 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 MCWILLAR 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
McWillar-Hugus-Goshawk families, complex, weakly weathered metasedimentary belt geology, mountain slopes, south aspects, brushy openings474460323970402lg9wid6701:24000
Gutridge-McWillar-Kingbolt complex, 30 to 60 percent slopes7804CO1181531206691sghpor60720181:24000
Analulu-McWillar-Kingbolt complex, 30 to 60 percent slopes1309CO1035731206982pf8zor60720181:24000
Analulu-McWillar-Vogel complex, 30 to 60 percent slopes7758CO896031206451sgfpor60720181:24000
Kingbolt-McWillar complex, 15 to 30 percent slopes1342BO678031203901qzf9or60720181:24000
Pasturecreek-McWillar-Analulu complex, 60 to 90 percent slopes7805DO384631206701sghqor60720181:24000
McWillar-Kingbolt complex, 15 to 30 percent slopes7793BO312731206611sghcor60720181:24000
Analulu-McWillar-Hondu complex, 30 to 60 percent slopes7763CO284431203212pgthor60720181:24000
McWillar-Analulu-Hondu complex, 30 to 60 percent slopes7766CO266631202611q6zvor60720181:24000
McWillar-Kingbolt complex, sandstone substratum, 15 to 30 percent slopes2005BO199131204191r00gor60720181:24000
Vogel-McWillar complex, 15 to 30 percent slopes7765BO193231207851v6m4or60720181:24000
McWillar-Kingbolt complex, 30 to 60 percent slopes7793CO128531206621sghfor60720181:24000
Analulu-Vogel-McWillar complex, sandstone substratum, 15 to 30 percent slopes2002BO126331204151r00bor60720181:24000
Kingbolt-McWillar complex, 0 to 15 percent slopes7792AO96431206601sghbor60720181:24000
Kingbolt-Analulu-McWillar complex, sandstone substratum, 30 to 60 percent slope2004CO96331204171r00dor60720181:24000
McWillar-Kingbolt complex, sandstone substratum, 30 to 60 percent slopes2005CO83031204201r00hor60720181:24000
Kingbolt-Analulu-McWillar complex, 30 to 60 percent slopes1341CO67731203891qzf8or60720181:24000
McWillar-Kingbolt complex, without serpentine, 0 to 15 percent slopes7554AO40631206171sgbxor60720181:24000
Vogel-McWillar complex, 0 to 15 percent slopes7765AO40031206511sgfyor60720181:24000
McWillar-Kingbolt complex, sandstone substratum, 0 to 15 percent slopes2005AO32231204181r00for60720181:24000
Analulu-McWillar complex, 15 to 30 percent slopes1308BO29031207771v69yor60720181:24000
Gutridge-McWillar-Kingbolt complex, 0 to 30 percent slopes7804NO16931207871v6m7or60720181:24000
Analulu-McWillar-Vogel complex, 30 to 60 percent slopes7758CO213231224291sgfpor62620181:24000
Gutridge-McWillar-Kingbolt complex, frost basin, 0 to 30 percent slopes7804NF18633854582tz1hor62620181:24000
Kingbolt-McWillar complex, 0 to 15 percent slopes7792AO11531224391sghbor62620181:24000
McWillar-Kingbolt complex, 15 to 30 percent slopes7793BO4233854561sghcor62620181:24000
Analulu-McWillar-Kingbolt complex, 30 to 60 percent slopes1309CO431224652pf8zor62620181:24000
Analulu-McWillar-Kingbolt complex, 30 to 60 percent slopes1309CO93424854242pf8zor63120181:24000
McWillar-Kingbolt complex, 15 to 30 percent slopes7793BO67624869021sghcor63120181:24000
McWillar gravelly ashy silt loam, 30 to 60 percent slopes7746CO33224375001sgf8or63120181:24000
Analulu-McWillar-Hondu complex, 30 to 60 percent slopes7763CO18824868972pgthor63120181:24000
Kingbolt-McWillar complex, 15 to 30 percent slopes1342BO10524861891qzf9or63120181:24000
Pasturecreek-McWillar-Analulu complex, 60 to 90 percent slopes7805DO6024375061sghqor63120181:24000
Vogel-McWillar complex, 15 to 30 percent slopes7765BO1024868991v6m4or63120181:24000
McWillar-Analulu-Hondu complex, 30 to 60 percent slopes7766CO324869001q6zvor63120181:24000
Analulu-Vogel-McWillar complex, sandstone substratum, 15 to 30 percent slopes2002BO41531215141r00bor64819771:24000
McWillar-Kingbolt complex, sandstone substratum, 15 to 30 percent slopes2005BO31831215171r00gor64819771:24000
McWillar-Kingbolt complex, sandstone substratum, 30 to 60 percent slopes2005CO9031215181r00hor64819771:24000
Kingbolt-Analulu-McWillar complex, sandstone substratum, 30 to 60 percent slope2004CO5331215161r00dor64819771:24000
Analulu-McWillar-Kingbolt complex, 30 to 60 percent slopes1309CO16031214802pf8zor66719841:20000

Map of Series Extent

Approximate geographic distribution of the MCWILLAR 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 .