Soil Data Explorer - MARR

Official Series Description

Lab Data Summary

Aggregate lab data for the MARR soil series. This aggregation is based on all pedons with a current taxon name of MARR, 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 MARR 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
149A	02N0513	S2001MD017017	Marr	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	38.5587502,-76.7539749

Water Balance

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

Soil series sharing subgroup-level classification with MARR, 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 MARR 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
Marr and Dodon soils, 15 to 25 percent slopes	MDE	10520	137791	4mcw	md003	2003	1:12000
Marr-Dodon complex, 5 to 10 percent slopes	MaC	10126	137789	4mct	md003	2003	1:12000
Marr-Dodon complex, 10 to 15 percent slopes	MaD	9850	137790	4mcv	md003	2003	1:12000
Marr-Dodon complex, 2 to 5 percent slopes	MaB	7764	137788	4mcs	md003	2003	1:12000
Marr and Dodon soils, 25 to 40 percent slopes	MDF	2325	137792	4mcx	md003	2003	1:12000
Marr-Dodon-Urban land complex, 0 to 5 percent slopes	MgB	103	137793	4mcy	md003	2003	1:12000
Marr-Dodon-Urban land complex, 5 to 15 percent slopes	MgD	78	137710	4m98	md003	2003	1:12000
Dodon and Marr soils, 15 to 25 percent slopes	DdE	12769	2516859	2pz7t	md009	1967	1:20000
Dodon-Marr complex, 5 to 10 percent slopes	DmC	10428	2516863	2pz7y	md009	1967	1:20000
Dodon-Marr complex, 10 to 15 percent slopes	DmD	6635	2516864	2pz7z	md009	1967	1:20000
Dodon and Marr soils, 25 to 80 percent slopes	DdG	6115	2516865	2pz80	md009	1967	1:20000
Marr-Dodon complex, 2 to 5 percent slopes	MaB	3748	2516885	4mcs	md009	1967	1:20000
Marr and Dodon soils, 25 to 40 percent slopes	MDF	1824	2516887	4mcx	md009	1967	1:20000
Marr-Dodon complex, 0 to 2 percent slopes	MaA	354	2516910	2q5zb	md009	1967	1:20000
Marr-Dodon complex, 5 to 10 percent slopes	MaC	271	2516906	2q5z1	md009	1967	1:20000
Marr and Dodon soils, 15 to 25 percent slopes	MDE	79	2516886	4mcw	md009	1967	1:20000
Marr-Dodon complex, 10 to 15 percent slopes	MaD	50	2516907	2q5z2	md009	1967	1:20000
Grosstown-Marr-Hoghole complex, 15 to 40 percent slopes	GmF	37507	1608632	1qzxc	md017	2007	1:12000
Grosstown-Marr-Hoghole complex, 5 to 15 percent slopes	GmD	15150	1608631	1qzxb	md017	2007	1:12000
Marr-Beltsville complex, 5 to 15 percent slopes	MkD	5157	1608645	1qzxs	md017	2007	1:12000
Marr-Dodon complex, 5 to 10 percent slopes	MnC	1534	1608640	1qzxm	md017	2007	1:12000
Croom-Marr complex, 15 to 25 percent slopes	CmE	1390	1608673	1qzyp	md017	2007	1:12000
Marr fine sandy loam, 25 to 60 percent slopes	MfG	1350	1608643	1qzxq	md017	2007	1:12000
Marr-Beltsville complex, 15 to 25 percent slopes	MkE	982	1608646	1qzxt	md017	2007	1:12000
Marr fine sandy loam, 15 to 25 percent slopes	MfE	956	1608642	1qzxp	md017	2007	1:12000
Marr-Dodon complex, 2 to 5 percent slopes	MnB	873	1608639	1qzxl	md017	2007	1:12000
Marr-Beltsville complex, 2 to 5 percent slopes	MkB	857	1608644	1qzxr	md017	2007	1:12000
Marr-Dodon complex, 10 to 15 percent slopes	MnD	759	1608641	1qzxn	md017	2007	1:12000
Marr fine sandy loam, 0 to 2 percent slopes	MfA	660	1608618	1qzwx	md017	2007	1:12000
Croom-Marr complex, 25 to 60 percent slopes	CmG	421	1608674	1qzyq	md017	2007	1:12000
Marr fine sandy loam, 2 to 5 percent slopes	MfB	372	1608619	1qzwy	md017	2007	1:12000
Marr-Beltsville complex, 25 to 40 percent slopes	MkF	312	1608647	1qzxv	md017	2007	1:12000
Croom-Marr complex, 10 to 15 percent slopes	CmD	275	1608672	1qzyn	md017	2007	1:12000
Marr-Dodon complex, 5 to 10 percent slopes	MnC	12598	2474822	2p27z	md033	2009	1:12000
Marr-Dodon complex, 15 to 25 percent slopes	MnE	11947	2474824	2p281	md033	2009	1:12000
Marr-Dodon complex, 10 to 15 percent slopes	MnD	10473	2474823	2p280	md033	2009	1:12000
Croom-Marr complex, 15 to 25 percent slopes	CwE	8309	2474891	2p2b6	md033	2009	1:12000
Marr-Dodon complex, 2 to 5 percent slopes	MnB	5508	2474821	2p27y	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
Marr-Dodon-Urban land complex, 5 to 15 percent slopes	MoD	1539	2474826	2p283	md033	2009	1:12000
Marr-Dodon-Urban land complex, 0 to 5 percent slopes	MoB	1480	2474825	2p282	md033	2009	1:12000
Urban land-Marr-Dodon complex, 0 to 5 percent slopes	UrmB	1037	2474827	2p284	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
Marr-Dodon complex, 0 to 2 percent slopes	MnA	407	2474820	2p27x	md033	2009	1:12000
Grosstown-Marr-Hoghole complex, 5 to 15 percent slopes	GmD	57	2455243	2ndwd	md033	2009	1:12000
Grosstown-Marr-Hoghole complex, 15 to 40 percent slopes	GmF	3	2455244	2ndwf	md033	2009	1:12000
Marr fine sandy loam, 2 to 6 percent slopes, moderately eroded	MaB2	460	128327	49jl	md037	1975	1:20000
Marr fine sandy loam, 6 to 12 percent slopes, moderately eroded	MaC2	261	128328	49jm	md037	1975	1:20000
Marr fine sandy loam, 6 to 12 percent slopes, severely eroded	MaC3	164	128329	49jn	md037	1975	1:20000
Marr very fine sandy loam, 25 to 50 percent slopes	36E	709	521190	khbl	va153	1985	1:15840
Marr very fine sandy loam, 7 to 25 percent slopes	36D	470	521189	khbk	va153	1985	1:15840
Marr very fine sandy loam, 15 to 30 percent slopes, eroded	MdE2	1379	120541	41ff	va179	1970	1:15840
Marr very fine sandy loam, 6 to 10 percent slopes, eroded	MdC2	829	120539	41fc	va179	1970	1:15840
Marr very fine sandy loam, 2 to 6 percent slopes	MdB	494	120538	41fb	va179	1970	1:15840
Marr very fine sandy loam, 10 to 15 percent slopes, eroded	MdD2	445	120540	41fd	va179	1970	1:15840

Map of Series Extent

Approximate geographic distribution of the MARR 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).