Soil Data Explorer - ASA

Official Series Description

Lab Data Summary

Aggregate lab data for the ASA soil series. This aggregation is based on all pedons with a current taxon name of ASA, 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 ASA 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 ASA 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 ASA 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 ASA 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 ASA 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 2D hillslope position figure.

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

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

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

Competing Series

Soil series competing with ASA 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 ASA 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).

There are insufficient data to create the annual climate figure.

Geomorphic description summaries for the ASA 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 2D hillslope position figure.

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

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

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 ASA, 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

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

1. TX-2010-11-02-19 | Burleson County - 2005

   Typical pattern of soils in the Ships-Belk and Burleson general soil map units (Soil Survey of Burleson County, Texas; 2005).

2. TX-2012-03-22-02 | Wharton County - March 1974

   Relationship of soils to the landscape in association 4 (Soil Survey of Wharton County, TX; 1974).

Map Units

Map units containing ASA 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
Asa silty clay loam, 0 to 1 percent slopes, rarely flooded	3	37019	363062	2v3ck	tx039	1979	1:20000
Asa silt loam, 0 to 1 percent slopes, rarely flooded	2	12473	363051	2v3cj	tx039	1979	1:20000
Norwood-Asa silt loams complex, 1 to 8 percent slopes, rarely flooded	35	2956	363068	2zrtz	tx039	1979	1:20000
Asa-Urban land complex, 0 to 1 percent slopes, rarely flooded	4	1802	363073	d5t1	tx039	1979	1:20000
Asa silty clay loam, 1 to 3 percent slopes, rarely flooded	AsB	1391	363424	d65c	tx051	1994	1:24000
Asa-Pledger complex, 0 to 1 percent slopes, rarely flooded	Ac	6683	365925	d8s1	tx157	1956	1:20000
Asa silty clay loam, 0 to 1 percent slopes, rarely flooded	Ab	2532	365924	2v3ck	tx157	1956	1:20000
Asa silt loam, 0 to 1 percent slopes, rarely flooded	Aa	2197	365923	2v3cj	tx157	1956	1:20000
Asa silt loam, 0 to 1 percent slopes, rarely flooded	Aa	16460	370488	2v3cj	tx321	1991	1:24000
Asa silty clay loam, 0 to 1 percent slopes, rarely flooded	As	9491	370489	2v3ck	tx321	1991	1:24000
Asa silty clay loam, saline, occasionally flooded	Az	5379	370490	dfj9	tx321	1991	1:24000
Asa silt loam, 0 to 1 percent slopes, rarely flooded	2	622	373146	dj8z	tx477	1979	1:24000
Asa silty clay loam, 0 to 1 percent slopes, rarely flooded	As	10741	373244	2v3ck	tx481	1968	1:20000

Map of Series Extent

Approximate geographic distribution of the ASA 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).