Soil Data Explorer - FORDUM

Official Series Description

Lab Data Summary

Aggregate lab data for the FORDUM soil series. This aggregation is based on all pedons with a current taxon name of FORDUM, 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 FORDUM 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 FORDUM 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 FORDUM 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 FORDUM 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 FORDUM 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 FORDUM 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 FORDUM 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 FORDUM 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 FORDUM, 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. MN-2010-09-13-07 | Wright County -

   A landscape view of some soils in areas of outwash, flood plain, and glacial till in Wright County (Soil Survey of Wright County, Minnesota).

2. WI-2012-03-23-33 | Shawano County - October 1982

   Relationship of sols and substratum in the Menahga-Croswell-Mahtomedi general map unit (Soil Survey of Shawano County, WI; 1982).

Map Units

Map units containing FORDUM 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
Fordum-Winterfield complex, 0 to 2 percent slopes, frequently flooded	Fo	183	885885	yqty	mn003	1972	1:15840
Fordum-Winterfield complex, 0 to 2 percent slopes, frequently flooded	1011A	2519	1899594	21rp7	mn009	2007	1:12000
Fordum loam, 0 to 2 percent slopes, occasionally flooded	D39A	17	753013	t8kr	mn009	2007	1:12000
Fordum sandy loam, frequently flooded	792	4016	396598	f9ph	mn025	1990	1:15840
Fordum, Fairdale, and Lamoure soils, frequently flooded	1147	1834	430390	gfvk	mn029	1993	1:20000
Fordum-Winterfield complex, 0 to 4 percent slopes, flooded	1011A	377	2732687	2slnc	mn035	2009	1:24000
Fordum-Winterfield complex, 0 to 2 percent slopes, frequently flooded	D19A	466	451585	h4x8	mn053	2001	1:12000
Elkriver-Fordum complex, 0 to 2 percent slopes, occasionally flooded	D35A	190	435222	glwf	mn053	2001	1:12000
Fordum fine sandy loam	792	3237	398914	fd36	mn077	1989	1:24000
Fordum, Fairdale, and Lamoure soils, frequently flooded	1147	6311	399198	fddc	mn087	1992	1:20000
Fordum-Winterfield complex, 0 to 2 percent slopes, frequently flooded	1011A	622	1676335	1t8cb	mn095	2006	1:12000
Fordum-Winterfield complex	1946	9973	400358	ffls	mn097	1987	1:20000
Fordum-Winterfield complex, 0 to 2 percent slopes, frequently flooded	1946	5324	431467	ggz9	mn141	1994	1:15840
Fordum silt loam, occasionally flooded	1985	1529	428783	gd5q	mn159	1987	1:20000
Fordum-Winterfield complex, 0 to 2 percent slopes, frequently flooded	1946	390	435090	glr5	mn171	1998	1:12000
Fordum loam, 0 to 2 percent slopes, occasionally flooded	1378	369	435076	glqq	mn171	1998	1:12000
Fordum fine sandy loam, 0 to 2 percent slopes, frequently flooded	792	99	433798	gkdh	mn171	1998	1:12000
Winterfield-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	WiFoA	4768	3053866	2xk6r	wi001	1978	1:20000
Fordum, Totagatic, and Bowstring soils, 0 to 1 percent slopes, frequently flooded	9050A	8406	1444557	1kh5m	wi003	2006	1:12000
Moppet, occasionally flooded-Fordum, frequently flooded complex, 0 to 3 percent slopes	755A	1776	1542713	1ns9y	wi003	2006	1:12000
Fordum silt loam, 0 to 2 percent slopes, frequently flooded	555A	660	1444442	1kh1x	wi003	2006	1:12000
Fordum silt loam, 0 to 2 percent slopes	Fm	5800	431297	ggst	wi005	1993	1:20000
Fordum silt loam, river valleys, 0 to 2 percent slopes, frequently flooded	555A	2750	3182059	2yt2r	wi005	1993	1:20000
Fordum, Totagatic, and Bowstring soils, 0 to 1 percent slopes, frequently flooded	9050A	3309	1383949	1hg3j	wi007	2005	1:12000
Fordum silt loam, 0 to 2 percent slopes, frequently flooded	555A	227	782479	v878	wi007	2005	1:12000
Fordum silt loam, 0 to 2 percent slopes, frequently flooded	555A	818	816939	wf2w	wi013	2004	1:12000
Moppet, occasionally flooded-Fordum, frequently flooded complex, 0 to 3 percent slopes	755A	107	816941	wf2y	wi013	2004	1:12000
Fordum loam, 0 to 2 percent slopes	Fm	6127	421525	g4ml	wi017	1985	1:15840
Fordum silt loam, river valleys, 0 to 2 percent slopes, frequently flooded	555A	4338	3182060	2yt2r	wi017	1985	1:15840
Dechamps-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	1638A	431	3182061	2yt2w	wi017	1985	1:15840
Moppet-Fordum complex, 0 to 3 percent slopes	MxA	10422	431905	ghff	wi019	1994	1:20000
Fordum silt loam, 0 to 2 percent slopes	Fm	7793	431868	ghd7	wi019	1994	1:20000
Sturgeon-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	StFoA	2476	3053869	2xk6t	wi019	1994	1:20000
Winterfield-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	WiFoA	386	3053868	2xk6r	wi019	1994	1:20000
Winterfield-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	WiFoA	47	3182041	2xk6r	wi021	1972	1:15840
Fordum silt loam, 0 to 2 percent slopes, frequently flooded	555A	305	781346	v71q	wi031	2005	1:12000
Dechamps-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	1638A	5618	3182075	2yt2w	wi033	2003	1:15840
Fordum silt loam, river valleys, 0 to 2 percent slopes, frequently flooded	555A	205	2518699	2yt2r	wi033	2003	1:15840
Sturgeon-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	StFoA	1997	3182130	2xk6t	wi035	1974	1:15840
Winterfield-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	WiFoA	1086	3182132	2xk6r	wi035	1974	1:15840
Fordum silt loam, river valleys, 0 to 2 percent slopes, frequently flooded	555A	532	421739	2yt2r	wi035	1974	1:15840
Dechamps-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	1638A	82	3182077	2yt2w	wi035	1974	1:15840
Fordum loam, 0 to 2 percent slopes	Fm	3297	430005	gfg4	wi037	1995	1:12000
Fordum loam, 0 to 2 percent slopes	Fm	4442	429838	gf8r	wi041	1995	1:12000
Fordum silt loam, 0 to 2 percent slopes, frequently flooded	555A	159	782214	v7yq	wi051	2006	1:12000
Fordum, Totagatic, and Bowstring soils, 0 to 1 percent slopes, frequently flooded	9050A	101	1701261	1v39d	wi051	2006	1:12000
Moppet, occasionally flooded-Fordum, frequently flooded complex, 0 to 3 percent slopes	755A	24	1701254	1v395	wi051	2006	1:12000
Winterfield-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	WiFoA	704	3053872	2xk6r	wi053	1994	1:20000
Winterfield-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	WiFoA	13266	2561524	2xk6r	wi057	1987	1:15840
Fordum mucky silt loam	Fm	3316	421050	g448	wi067	1983	1:20000
Fordum loam, 0 to 2 percent slopes	Fh	5425	431616	gh43	wi069	1993	1:20000
Fordum silt loam, 0 to 1 percent slopes	Fh	20998	431367	ggw2	wi073	1998	1:20000
Fordum mucky very fine sandy loam, 0 to 2 percent slopes	Fh	4256	421085	g45d	wi085	1988	1:20000
Dechamps-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	1638A	161	3182086	2yt2w	wi093	2006	1:12000
Dechamps-Fordum-Caryville complex, 0 to 6 percent slopes, commonly flooded	26B	361	2427687	2mh6h	wi095	1978	1:15840
Fordum-Ausable complex, 0 to 2 percent slopes, frequently flooded	5555A	171	2427697	2mh6t	wi095	1978	1:15840
Fordum silt loam, 0 to 2 percent slopes, frequently flooded	555A	71	2487143	2ph2f	wi095	1978	1:15840
Winterfield-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	WiFoA	5115	3053878	2xk6r	wi097	1972	1:20000
Sturgeon-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	StFoA	744	3053876	2xk6t	wi097	1972	1:20000
Moppet, occasionally flooded-Fordum, frequently flooded complex, 0 to 3 percent slopes	755A	7748	627567	p213	wi099	2006	1:12000
Fordum, Totagatic, and Bowstring soils, 0 to 1 percent slopes, frequently flooded	9050A	6047	1395740	1hvcw	wi099	2006	1:12000
Fordum silt loam, 0 to 2 percent slopes, frequently flooded	555A	4793	627534	p201	wi099	2006	1:12000
Fordum silt loam, 0 to 2 percent slopes, frequently flooded	555A	10686	625084	nzg0	wi107	2006	1:12000
Moppet, occasionally flooded-Fordum, frequently flooded complex, 0 to 3 percent slopes	755A	5865	625118	nzh3	wi107	2006	1:12000
Winterfield-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	WiFoA	239	3182097	2xk6r	wi111	1977	1:15840
Fordum, Totagatic, and Bowstring soils, 0 to 1 percent slopes, frequently flooded	9050A	7619	1386108	1hjc5	wi113	2006	1:12000
Moppet, occasionally flooded-Fordum, frequently flooded complex, 0 to 3 percent slopes	755A	2626	626778	p16n	wi113	2006	1:12000
Fordum silt loam, 0 to 2 percent slopes, frequently flooded	555A	2562	625849	p07p	wi113	2006	1:12000
Fordum loam	Fu	9868	422670	g5tj	wi115	1981	1:15840
Fordum silt loam, 0 to 2 percent slopes	555A	10491	420999	g42m	wi119	2002	1:12000
Moppet-Fordum complex, 0 to 3 percent slopes	755A	6332	421026	g43h	wi119	2002	1:12000
Fordum silt loam, 0 to 2 percent slopes, frequently flooded	555A	700	449021	h27k	wi129	2002	1:12000
Fordum loam	Fa	8682	422710	g5vt	wi135	1982	1:15840
Winterfield-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	WiFoA	7287	3053879	2xk6r	wi141	1971	1:20000
Sturgeon-Fordum complex, river valleys, 0 to 3 percent slopes, frequently flooded	StFoA	4168	3053881	2xk6t	wi141	1971	1:20000

Map of Series Extent

Approximate geographic distribution of the FORDUM 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).