Soil Data Explorer - SPEER

Official Series Description

Lab Data Summary

Aggregate lab data for the SPEER soil series. This aggregation is based on all pedons with a current taxon name of SPEER, 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 SPEER were used in the calculation. Source: KSSL snapshot (updated 2020-03-13). 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 SPEER 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.

Sibling Summary

Siblings are those soil series that occur together in map units, in this case with the SPEER series. Sketches are arranged according to their subgroup-level taxonomic structure. Source: SSURGO snapshot (updated 2024-02-21), parsed OSD records (updated 2023-10-02) and snapshot of SC database (updated 2023-10-02).

Select annual climate data summaries for the SPEER 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 2023-10-09).

Geomorphic description summaries for the SPEER 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 2023-10-04).

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

Competing Series

Soil series competing with SPEER share the same family level classification in Soil Taxonomy. Source: parsed OSD records (updated 2023-10-02) and snapshot of the SC database (updated 2023-10-02).

Select annual climate data summaries for the SPEER 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 2023-10-09).

Geomorphic description summaries for the SPEER 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 2023-10-04).

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

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

Soil series sharing subgroup-level classification with SPEER, 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 2023-10-02).

Block Diagrams

No block diagrams are available.

Map Units

Map units containing SPEER 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
Speer fine sandy loam, 0 to 2 percent slopes, occasionally flooded	50B	2722	577492	2y1l0	ar097	1997	1:24000
Speer loam, 0 to 2 percent slopes, rarely flooded	51B	1384	577493	2y1l3	ar097	1997	1:24000
Speer fine sandy loam, 0 to 2 percent slopes, rarely flooded	78	7214	1542885	2y1l1	ar109	2005	1:20000
Speer fine sandy loam, 0 to 2 percent slopes, occasionally flooded	77	1943	1542884	2y1l0	ar109	2005	1:20000
Speer fine sandy loam, 0 to 2 percent slopes, rarely flooded	34B	5411	570869	2y1l1	ar113	1991	1:20000
Speer fine sandy loam, 0 to 2 percent slopes, occasionally flooded	35B	2881	570870	2y1l0	ar113	1991	1:20000
Speer loam, 0 to 2 percent slopes, rarely flooded	35B	808	1707537	2y1l3	ar133	1996	1:24000
Speer loam, 0 to 2 percent slopes, occasionally flooded	36B	464	1707538	2y1l2	ar133	1996	1:24000
Speer fine sandy loam, 0 to 2 percent slopes, occasionally flooded	NG157	882	2495377	2y1l0	ar149	1985	1:20000
Speer fine sandy loam, 0 to 1 percent slopes, rarely flooded	49	6003	571241	2y1l5	ok023	1977	1:24000
Speer-Neff association, 1 to 3 percent slopes, occasionally flooded	70	10970	571458	2y1kz	ok079	1981	1:24000
Speer fine sandy loam, 0 to 1 percent slopes, occasionally flooded	69	6482	571456	2y1ky	ok079	1981	1:24000
Speer loam, 1 to 3 percent slopes, rarely flooded	54	4612	571308	2y1l4	ok127	1977	1:24000
Speer fine sandy loam, 0 to 1 percent slopes, rarely flooded	Ra	2809	571905	2y1l7	ok135	1966	1:24000

Map of Series Extent

Approximate geographic distribution of the SPEER 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 2023-10-04).