Soil Data Explorer - CROOM

Official Series Description

Lab Data Summary

Aggregate lab data for the CROOM soil series. This aggregation is based on all pedons with a current taxon name of CROOM, 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 CROOM were used in the calculation. Source: KSSL snapshot (updated 2020-03-18). 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
149A	04N1048	S2004MD033036	Croom	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	38.6803055,-76.9494705

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the CROOM 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 CROOM 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 CROOM 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 CROOM 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 CROOM 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 CROOM 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 CROOM 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 flats position figure.

Soil series sharing subgroup-level classification with CROOM, 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. DC-2011-05-31-01 | District of Columbia - 1976

   Typical pattern of soils and parent material in the Urban land-Beltsville-Chillum association (Soil Survey of District of Columbia; 1976).

2. DC-2011-05-31-04 | District of Columbia - 1976

   Diagram of fall line between the Piedmont Plateau and the Coastal Plain. Diagram also shows the relationship of parent material and topography (Soil Survey of District of Columbia; 1976).

Map Units

Map units containing CROOM 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
Croom-Urban land complex, 8 to 15 percent slopes	CxC	327	128594	49t6	dc001	1975	1:12000
Croom very gravelly sandy loam, 15 to 40 percent slopes	CwD	202	128592	49t4	dc001	1975	1:12000
Croom very gravelly sandy loam, 8 to 15 percent slopes	CwC	115	128591	49t3	dc001	1975	1:12000
Urban land-Croom complex, 8 to 15 percent slopes	UkC	100	128679	49wy	dc001	1975	1:12000
Croom-Urban land complex, 0 to 8 percent slopes	CxB	90	128593	49t5	dc001	1975	1:12000
Croom-Urban land complex, 15 to 25 percent slopes	CxD	67	128595	49t7	dc001	1975	1:12000
Croom very gravelly sandy loam, 0 to 8 percent slopes	CwB	41	128590	49t2	dc001	1975	1:12000
Sassafras and Croom soils, 15 to 25 percent slopes	SME	5288	137555	4m48	md003	2003	1:12000
Sassafras and Croom soils, 25 to 40 percent slopes	SMF	1304	137824	4mdy	md003	2003	1:12000
Croom-Urban land complex, 5 to 15 percent slopes	CoD	2234	2424752	2md4t	md005	2010	1:12000
Sassafras-Croom-Urban land complex, 5 to 15 percent slopes	ShD	945	2405590	2lr6p	md005	2010	1:12000
Croom-Urban land complex, 0 to 5 percent slopes	CoB	693	2424667	2md22	md005	2010	1:12000
Sassafras and Croom soils, 15 to 25 percent slopes	SDE	405	2405588	2lr6m	md005	2010	1:12000
Sassafras and Croom soils, 10 to 15 percent slopes	SDD	292	2405587	2lr6l	md005	2010	1:12000
Croom gravelly sandy loam, 2 to 5 percent slopes	CnB	288	2424669	2md24	md005	2010	1:12000
Croom gravelly sandy loam, 5 to 10 percent slopes	CnC	235	2424668	2md23	md005	2010	1:12000
Croom gravelly sandy loam, 10 to 15 percent slopes	CnD	203	2481175	2p8vx	md005	2010	1:12000
Sassafras-Croom complex, 5 to 10 percent slopes	ScC	185	2405583	2lr6g	md005	2010	1:12000
Croom and Hoghole soils, 15 to 40 percent slopes	ChF	280	2516861	2pz7w	md009	1967	1:20000
Sassafras and Croom soils, 15 to 25 percent slopes	SME	2220	2440636	2mxp6	md015	2009	1:12000
Sassafras and Croom soils, 25 to 40 percent slopes	SMF	595	2440637	2mxp7	md015	2009	1:12000
Croom-Marr complex, 15 to 25 percent slopes	CmE	1390	1608673	1qzyp	md017	2007	1:12000
Croom-Marr complex, 25 to 60 percent slopes	CmG	421	1608674	1qzyq	md017	2007	1:12000
Croom-Marr complex, 10 to 15 percent slopes	CmD	275	1608672	1qzyn	md017	2007	1:12000
Sassafras and Croom soils, 5 to 10 percent slopes	SrC	704	793645	vmvg	md027	2004	1:12000
Sassafras and Croom soils, 10 to 15 percent slopes	SrD	576	793646	vmvh	md027	2004	1:12000
Croom and Evesboro soils, 10 to 15 percent slopes	CrD	439	792810	vlzj	md027	2004	1:12000
Sassafras and Croom soils, 15 to 25 percent slopes	SrE	256	793647	vmvj	md027	2004	1:12000
Croom-Urban land complex, 0 to 8 percent slopes	61UB	712	533666	kxb1	md031	1989	1:15840
Croom gravelly loam, 3 to 8 percent slopes	61B	391	533662	kx9x	md031	1989	1:15840
Croom gravelly loam, 8 to 15 percent slopes	61C	378	533663	kx9y	md031	1989	1:15840
Croom gravelly loam, 25 to 40 percent slopes	61E	216	533665	kxb0	md031	1989	1:15840
Croom gravelly loam, 15 to 25 percent slopes	61D	145	533664	kx9z	md031	1989	1:15840
Croom-Marr complex, 15 to 25 percent slopes	CwE	8309	2474891	2p2b6	md033	2009	1:12000
Croom-Marr complex, 10 to 15 percent slopes	CwD	3513	2474890	2p2b5	md033	2009	1:12000
Croom-Marr complex, 25 to 60 percent slopes	CwG	2381	2474892	2p2b7	md033	2009	1:12000
Croom-Marr-Urban land complex, 5 to 15 percent slopes	CxD	2201	2474893	2p2b8	md033	2009	1:12000
Croom gravelly sandy loam, 5 to 10 percent slopes	CrC	1474	2455252	2ndwp	md033	2009	1:12000
Sassafras and Croom soils, 15 to 25 percent slopes	SOE	1238	2474844	2p28p	md033	2009	1:12000
Croom-Howell-Collington complex, 25 to 40 percent slopes	CsF	980	2474897	2p2bd	md033	2009	1:12000
Croom-Urban land complex, 5 to 15 percent slopes	CzD	909	2455256	2ndwt	md033	2009	1:12000
Croom-Howell-Collington complex, 15 to 25 percent slopes	CsE	869	2474896	2p2bc	md033	2009	1:12000
Croom-Marr-Urban land complex, 15 to 25 percent slopes	CxE	810	2474894	2p2b9	md033	2009	1:12000
Croom-Marr complex, 5 to 10 percent slopes	CwC	805	2474889	2p2b4	md033	2009	1:12000
Sassafras and Croom soils, 10 to 15 percent slopes	SOD	758	2474843	2p28n	md033	2009	1:12000
Croom gravelly sandy loam, 10 to 15 percent slopes	CrD	699	2455253	2ndwq	md033	2009	1:12000
Croom gravelly sandy loam, 2 to 5 percent slopes	CrB	667	2455251	2ndwn	md033	2009	1:12000
Croom-Urban land complex, 0 to 5 percent slopes	CzB	620	2455255	2ndws	md033	2009	1:12000
Sassafras and Croom soils, 25 to 40 percent slopes	SOF	610	2474845	2p28q	md033	2009	1:12000
Sassafras-Croom complex, 5 to 10 percent slopes	ScC	528	2474842	2p28m	md033	2009	1:12000
Croom-Urban land complex, 15 to 25 percent slopes	CzE	499	2455257	2ndwv	md033	2009	1:12000
Sassafras-Croom-Urban land complex, 5 to 15 percent slopes	SdD	435	2474846	2p28r	md033	2009	1:12000
Croom-Howell-Collington complex, 10 to 15 percent slopes	CsD	382	2474895	2p2bb	md033	2009	1:12000
Croom gravelly sandy loam, 15 to 25 percent slopes	CrE	295	2455254	2ndwr	md033	2009	1:12000
Croom-Howell-Urban land complex, 5 to 15 percent slopes	CuD	162	2474898	2p2bf	md033	2009	1:12000
Croom gravelly sandy loam, 10 to 15 percent slopes, severely eroded	CrD3	8203	128305	49hw	md037	1975	1:20000
Croom gravelly sandy loam, 10 to 15 percent slopes, moderately eroded	CrD2	5844	128304	49hv	md037	1975	1:20000
Croom gravelly sandy loam, 5 to 10 percent slopes, moderately eroded	CrC2	990	128303	49ht	md037	1975	1:20000
Croom gravelly sandy loam, 2 to 5 percent slopes, moderately eroded	CrB2	296	128302	49hs	md037	1975	1:20000

Map of Series Extent

Approximate geographic distribution of the CROOM 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).