Soil Data Explorer - BOLAR

Official Series Description

Lab Data Summary

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

Pedons used in the lab summary:

MLRA	Lab ID	Pedon ID	Taxonname	CI	NSSL / NASIS Reports	Link To SoilWeb GMap
85	87P0051	86TX193004	Bolar	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	31.7538891,-97.930275
85	08N0178	S2007TX367002	Bolar	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	32.6967735,-97.7593689

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the BOLAR 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 BOLAR 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 BOLAR 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 BOLAR 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.

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

Competing Series

Soil series competing with BOLAR 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 BOLAR 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 BOLAR 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 BOLAR, 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-2010-11-03-22 | Hamilton County - 2007

   Pattern of soils and underlying material in the Denton-Bolar-Oglesby and Eckrant-Evant general soil map units (Soil Survey of Hamilton County, Texas; 2007).

2. TX-2010-11-04-03 | McLennan County - 2001

   Pattern of soils in the Aledo-Eckrant general soil map unit (Soil Survey of McLennan County, Texas; 2001).

3. TX-2012-03-20-21 | Comal and Hays Counties - June 1984

   Pattern of soils in the Brackett-Comfort-Real general soil map unit (Soil Survey of Comal and Hays Counties, TX; 1984).

4. TX-2012-03-20-25 | Comal and Hays Counties - June 1984

   Pattern of soils in the Krum-Medlin-Eckrant general soil map unit (Soil Survey of Comal and Hays Counties, TX; 1984).

5. TX-2012-03-20-28 | Coryell County - May 1985

   Typical pattern of soils in the Denton-Bolar map unit and the Eckrant-Real-Rock outcrop map unit (Soil Survey of Coryell County, TX; 1985).

6. TX-2012-03-21-17 | Johnson County - October 1985

   Typical pattern of soils and parent material in the Aledo-Bolar map unit (Soil Survey of Johnson County, TX; 1985).

7. TX-2012-03-22-22 | Wise County - May 1989

   Typical pattern of the Sanger-Purves-Somervell general soil map unit (Soil Survey of Wise County, TX; 1989).

Map Units

Map units containing BOLAR 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
Bolar gravelly clay loam, 1 to 4 percent slopes	BlC	44	608495	2tc2l	tx027	1972	1:24000
Bolar clay loam, 1 to 3 percent slopes	BcB	1926	363034	2tc2f	tx035	1977	1:24000
Bolar clay loam, 3 to 5 percent slopes	BcC	1292	363035	2tc2h	tx035	1977	1:24000
Purves-Bolar association, 1 to 8 percent slopes	PXD	81652	364401	30bzx	tx093	1974	1:20000
Bolar clay loam, 3 to 5 percent slopes	BcC	10030	364354	2tc2h	tx093	1974	1:20000
Brackett-Bolar complex, 1 to 5 percent slopes	BrC	6940	364358	d74h	tx093	1974	1:20000
Bolar clay loam, 1 to 3 percent slopes	BcB	3854	364353	2tc2f	tx093	1974	1:20000
Bolar clay loam, 5 to 8 percent slopes	BcD	2148	364355	2tc2k	tx093	1974	1:20000
Bolar-Aledo complex, 3 to 20 percent slopes	10	17582	364457	2tc2m	tx097	1973	1:24000
Bolar clay loam, 1 to 5 percent slopes	7	12224	364522	2tc2g	tx097	1973	1:24000
Bolar stony clay loam, 5 to 12 percent slopes	9	2530	364539	d7bb	tx097	1973	1:24000
Bolar clay loam, 5 to 8 percent slopes	8	2455	364533	2tc2k	tx097	1973	1:24000
Bolar gravelly clay loam, 1 to 4 percent slopes	BgB	30175	391144	2tc2l	tx099	1983	1:24000
Bolar clay loam, 3 to 5 percent slopes	17	2477	364966	2tc2h	tx121	1975	1:24000
Bolar clay loam, 1 to 3 percent slopes	16	1788	364965	2tc2f	tx121	1975	1:24000
Bolar clay loam, 1 to 3 percent slopes	BcB	7601	365224	2tc2f	tx133	1972	1:20000
Bolar-Denton complex 3 to 5 percent slopes	BdC	13477	365352	30knb	tx143	1966	1:20000
Bolar-Aledo complex, 3 to 20 percent slopes	15	3024	366649	2tc2m	tx181	1977	1:20000
Bolar clay loam, 1 to 5 percent slopes	13	1367	366647	2tc2g	tx181	1977	1:20000
Bolar clay loam, 5 to 8 percent slopes	14	788	366648	2tc2k	tx181	1977	1:20000
Bolar gravelly clay loam, 1 to 4 percent slopes	BgB	4179	376645	2tc2l	tx193	1994	1:24000
Bolar-Sunev complex, 3 to 5 percent slopes	19	5144	367730	dbn8	tx217	1975	1:20000
Bolar clay loam, 3 to 8 percent slopes	18	3614	367729	2tc2j	tx217	1975	1:20000
Bolar clay loam, 1 to 3 percent slopes	17	2256	367728	2tc2f	tx217	1975	1:20000
Aledo-Bolar association, 1 to 8 percent slopes	AbC	70482	368146	2tc39	tx251	1981	1:20000
Bolar clay loam, 3 to 8 percent slopes	BoC	12899	368152	2tc2j	tx251	1981	1:20000
Bolar-Aledo complex, 3 to 20 percent slopes	BpE	9461	368153	2tc2m	tx251	1981	1:20000
Bolar clay loam, 1 to 3 percent slopes	BoB	7695	368151	2tc2f	tx251	1981	1:20000
Bolar clay loam, 1 to 3 percent slopes	BoB	4241	368846	2tc2f	tx281	1990	1:24000
Bolar clay loam, 3 to 5 percent slopes	BoC	161	368847	2tc2h	tx281	1990	1:24000
Bolar gravelly clay loam, 1 to 4 percent slopes	BgB	13237	370077	2tc2l	tx309	1992	1:24000
Bolar-Aledo complex, 3 to 20 percent slopes	6	11971	370795	2tc2m	tx337	1975	1:24000
Bolar clay loam, 1 to 5 percent slopes	5	1485	370794	2tc2g	tx337	1975	1:24000
Aledo-Bolar association, 1 to 8 percent slopes	ALE	98161	390853	2tc39	tx367	1973	1:20000
Bolar clay loam, 3 to 5 percent slopes	BcC	4268	390859	2tc2h	tx367	1973	1:20000
Bolar clay loam, 5 to 8 percent slopes	BcD	2790	390860	2tc2k	tx367	1973	1:20000
Bolar clay loam, 1 to 3 percent slopes	BcB	1028	390858	2tc2f	tx367	1973	1:20000
Bolar-Aledo complex, 3 to 20 percent slopes	AbE	21475	372364	2tc2m	tx439	1979	1:20000
Aledo-Bolar-Urban land complex, 3 to 20 percent slopes	AuE	14300	372375	dhh3	tx439	1979	1:20000
Bolar clay loam, 3 to 5 percent slopes	BoC	3832	372359	2tc2h	tx439	1979	1:20000
Bolar clay loam, 1 to 3 percent slopes	BoB	2200	372358	2tc2f	tx439	1979	1:20000
Bolar-Urban land complex, 1 to 5 percent slopes	BuC	2125	372360	dhgm	tx439	1979	1:20000
Bolar clay loam, 1 to 3 percent slopes	BoB	3836	373650	2tc2f	tx497	1984	1:20000
Bolar clay loam, 3 to 5 percent slopes	BoC	2982	373651	2tc2h	tx497	1984	1:20000
Bolar clay loam, 1 to 3 percent slopes	4	38204	373934	2t272	tx601	1977	1:31680
Bolar clay loam, 3 to 5 percent slopes	5	8505	373941	dk3m	tx601	1977	1:31680
Bolar-Brackett complex, 1 to 8 percent slopes	6	89912	391037	f3x3	tx602	1975	1:24000
Bolar clay loam, 3 to 5 percent slopes	5	46395	391026	2tc2h	tx602	1975	1:24000
Bolar clay loam, 1 to 3 percent slopes	BrB	16217	378707	2t272	tx604	1981	1:20000
Aledo-Bolar association, 1 to 8 percent slopes	AbE	53195	374319	2tc39	tx609	1975	1:20000
Bolar clay loam, 3 to 5 percent slopes	BcC	2228	374321	2tc2h	tx609	1975	1:20000
Bolar clay loam, 1 to 3 percent slopes	BcB	2212	374320	2tc2f	tx609	1975	1:20000

Map of Series Extent

Approximate geographic distribution of the BOLAR 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).