Soil Data Explorer - SOBOBA

Official Series Description

Lab Data Summary

Aggregate lab data for the SOBOBA soil series. This aggregation is based on all pedons with a current taxon name of SOBOBA, 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 SOBOBA were used in the calculation. Source: KSSL snapshot (updated 2020-03-18). 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 SOBOBA 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 SOBOBA series. Sketches are arranged according to their subgroup-level taxonomic structure. Source: SSURGO snapshot (updated 2024-02-21), parsed OSD records (updated 2023-10-06) and snapshot of SC database (updated 2023-10-02).

Select annual climate data summaries for the SOBOBA 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 SOBOBA 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).

Competing Series

Soil series competing with SOBOBA share the same family level classification in Soil Taxonomy. Source: parsed OSD records (updated 2023-10-06) and snapshot of the SC database (updated 2023-10-02).

Select annual climate data summaries for the SOBOBA 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 SOBOBA 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 hills figure.

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 SOBOBA, 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 SOBOBA 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
Soboba gravelly sandy loam	Sn	2199	459281	hdxj	ca113	1968	1:20000
Soboba stony loamy sand, 9 to 30 percent slopes	SsE	5944	456931	hbgq	ca638	1967	1:24000
Soboba cobbly loamy sand, 0 to 15 percent slopes	198	287	725853	sc9m	ca638	1967	1:24000
SOBOBA GRAVELLY SAND, COOL, 2 TO 9 PERCENT SLOPES	161	1300	463980	hkt3	ca671	1978	1:24000
Elder-Soboba complex, 2 to 9 percent slopes	Eb	448	457597	hc56	ca673	1974	1:24000
Soboba cobbly loamy sand, 2 to 5 percent slopes	SoB	2365	457914	hchf	ca675	1968	1:24000
Urban land-Soboba complex, 0 to 5 percent slopes	1006LA		2911683	2pt3v	ca676	1975	1:24000
Soboba and Tujunga soils, 0 to 5 percent slopes, frequently flooded	1266LA		2911689	2rshk	ca676	1975	1:24000
Soboba gravelly loamy sand, 0 to 2 percent slopes	130	1110	456032	h9jq	ca676	1975	1:24000
Soboba gravelly loamy sand, 2 to 9 percent slopes	131	260	456033	h9jr	ca676	1975	1:24000
Soboba and Tujunga soils, 0 to 5 percent slopes, frequently flooded	1266LA		2911712	2rshk	ca677	1972	1:24000
Soboba stony loamy sand, 2 to 9 percent slopes	SpC	23225	457989	hckv	ca677	1972	1:24000
Soboba gravelly loamy sand, 0 to 9 percent slopes	SoC	11740	457988	hckt	ca677	1972	1:24000
Soboba cobbly loamy sand, 0 to 15 percent slopes	198	4540	458099	hcpd	ca678	1974	1:24000
Soboba gravelly loamy sand, 0 to 5 percent slopes	197	2520	458098	hcpc	ca678	1974	1:24000
Soboba stony loamy sand, 2 to 15 percent slopes	SsD	2874	458370	hcz4	ca679	1967	1:15840
Soboba cobbly loamy sand, 2 to 25 percent slopes	SrE	1746	458369	hcz3	ca679	1967	1:15840
Soboba gravelly loamy sand, 0 to 5 percent slopes	197	489	729091	sgp2	ca679	1967	1:15840
Soboba cobbly loamy sand, 0 to 15 percent slopes	198	39	729095	sgp6	ca679	1967	1:15840
Soboba cobbly sand, 2 to 15 percent slopes	SoD	810	464055	hkwj	ca680	1974	1:24000
Soboba stony sand, 5 to 30 percent slopes	SpE	410	464056	hkwk	ca680	1974	1:24000
Urban land-Soboba complex, 0 to 5 percent slopes	1006	17042	2513710	2pt3v	ca696	2016	1:24000
Urban land-Soboba-Tujunga complex, 5 to 15 percent slopes	1011	9359	2670235	2rshn	ca696	2016	1:24000
Urban land, commercial-Soboba complex, 0 to 5 percent slopes	1106	4681	2670236	2rshq	ca696	2016	1:24000
Soboba and Tujunga soils, 0 to 5 percent slopes, frequently flooded	1266	4573	2670231	2rshk	ca696	2016	1:24000
Soboba stony loamy sand, 2 to 9 percent slopes	SpCsb	712	2562686	hckv	ca696	2016	1:24000
Soboba stony loamy sand, 2 to 9 percent slopes	SpCsb		2911746	hckv	ca776	1981	1:24000
Soboba and Tujunga soils, 0 to 5 percent slopes, frequently flooded	1266LA		2911697	2rshk	ca776	1981	1:24000
Urban land-Soboba-Tujunga complex, 5 to 15 percent slopes	1011LA		2911693	2rshn	ca776	1981	1:24000
Soboba-Hanford families association, 2 to 15 percent slopes	AbD	10	779899	v5k1	ca776	1981	1:24000
Soboba-Hanford families association, 2 to 15 percent slopes	AbD	11570	471608	htr5	ca777	1981	1:24000
Riverwash-Soboba families association, 2 to 15 percent slopes	EsD	4505	471639	hts5	ca777	1981	1:24000
Soboba stony loamy sand, 2 to 9 percent slopes	SpC	11	848221	xgmz	ca777	1981	1:24000
Soboba stony loamy sand, 2 to 15 percent slopes	SsD	2	1380276	1hb91	ca777	1981	1:24000

Map of Series Extent

Approximate geographic distribution of the SOBOBA 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).