Soil Data Explorer - EGAN

Official Series Description

Lab Data Summary

Aggregate lab data for the EGAN soil series. This aggregation is based on all pedons with a current taxon name of EGAN, 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 EGAN 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
102B	92P0723	92SD027016	EGAN	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.0419426,-96.9819412
102B	40A2438	K56SD099002	EGAN	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.798119,-97.089889
102B	40A2410	K56SD099007	EGAN	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.688169,-96.979944
102B	40A2439	S1956SD099003	EGAN	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.8349876,-97.0839539
102B	40A2409	S1956SD099006	EGAN	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.6527786,-96.9361115

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the EGAN 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 EGAN 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 EGAN 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 EGAN 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 EGAN 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 EGAN 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 EGAN 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 EGAN, 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. SD-2010-11-01-06 | Clay County - 2003

   Typical pattern of soils and underlying material in the Egan-Ethan-Trent association (Soil Survey of Clay County, South Dakota; 2003).

2. SD-2010-11-01-10 | Minnehaha County - 2004

   Typical pattern of soils and parent material in the Egan-Ethan-Trent association (Soil Survey of Minnehaha County, South Dakota; 2004).

3. SD-2012-03-15-68 | Lake County - December 1973

   Relationship of soils to topography and the underlying materials in the Egan-Wentworth association (Soil Survey of Lake County, SD; 1973).

4. SD-2012-03-15-76 | Miner County - December 1984

   Pattern of soils and parent material in the Egan-Huntimer-Trent and Arlo-Baltic associations (Soil Survey of Miner County, SD; 1984).

5. SD-2012-03-15-83 | Moody County - April 1989

   Pattern of soils and parent material in the Egan-Baltic association (Soil Survey of Moody County, SD; 1989).

6. SD-2012-03-16-02 | Turner County - November 1982

   Pattern of soils and parent material in the Egan-Ethan association (Soil Survey of Turner County, SD; 1982).

Map Units

Map units containing EGAN 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
Egan silty clay loam, 2 to 5 percent slopes	411B	7232	409115	fqq8	ia119	1973	1:15840
Egan silty clay loam, 2 to 5 percent slopes, moderately eroded	411B2	4897	409116	fqq9	ia119	1973	1:15840
Egan silty clay loam, 5 to 9 percent slopes, moderately eroded	411C2	3159	409117	fqqb	ia119	1973	1:15840
Egan silty clay loam, 9 to 14 percent slopes, moderately eroded	411D2	349	409118	fqqc	ia119	1973	1:15840
Egan-Ethan complex, 2 to 6 percent slopes	EaB	393	418747	g1qz	sd011	1995	1:24000
Ethan-Egan complex, 6 to 9 percent slopes	EwC	228	418756	g1r8	sd011	1995	1:24000
Egan-Wentworth-Trent complex, 2 to 6 percent slopes	EeB	198	418748	2vwcf	sd011	1995	1:24000
Egan-Chancellor-Davison complex, 0 to 3 percent slopes	EaA	24913	445548	gymj	sd027	1995	1:24000
Egan-Ethan-Trent complex, 1 to 6 percent slopes	EgB	18646	445555	gymr	sd027	1995	1:24000
Egan-Clarno-Chancellor complex, 0 to 3 percent slopes	EbA	16866	445549	gymk	sd027	1995	1:24000
Egan-Clarno-Trent complex, 0 to 2 percent slopes	EdA	12751	445551	gymm	sd027	1995	1:24000
Davison-Tetonka-Egan complex, 0 to 3 percent slopes	DkA	11448	445544	gymd	sd027	1995	1:24000
Egan-Clarno-Tetonka complex, 0 to 2 percent slopes	EcA	10056	445550	gyml	sd027	1995	1:24000
Egan-Trent silty clay loams, 0 to 2 percent slopes	EhA	9924	445556	gyms	sd027	1995	1:24000
Egan-Ethan-Tetonka complex, 0 to 6 percent slopes	EfB	7382	445554	gymq	sd027	1995	1:24000
Egan-Clarno-Trent complex, 1 to 6 percent slopes	EdB	5617	445552	gymn	sd027	1995	1:24000
Egan-Trent-Chancellor silty clay loams, 0 to 2 percent slopes	Ek	3765	445558	gymv	sd027	1995	1:24000
Egan-Trent silty clay loams, 1 to 6 percent slopes	EhB	373	445557	gymt	sd027	1995	1:24000
Egan-Ethan complex, 2 to 6 percent slopes	EeB	180	445553	gymp	sd027	1995	1:24000
Ethan-Egan complex, 6 to 9 percent slopes	EvC	176	445570	gyn7	sd027	1995	1:24000
Egan-Wentworth complex, 2 to 6 percent slopes	EhB	66885	416493	2vwcd	sd079	1967	1:20000
Egan-Beadle complex, 2 to 6 percent slopes	EbB	29143	416488	fzd3	sd079	1967	1:20000
Egan-Viborg silty clay loams, 0 to 3 percent slopes	EgA	20201	416492	fzd7	sd079	1967	1:20000
Egan-Ethan complex, 6 to 9 percent slopes, eroded	EeC2	19515	416491	fzd6	sd079	1967	1:20000
Egan-Beadle complex, 6 to 9 percent slopes	EbC	9861	416489	fzd4	sd079	1967	1:20000
Viborg-Egan silty clay loams, 2 to 6 percent slopes	VgB	4388	416519	fzf3	sd079	1967	1:20000
Egan silty clay loam, 6 to 11 percent slopes	EaC	3837	416486	2vwbp	sd079	1967	1:20000
Egan-Wentworth complex, 0 to 2 percent slopes	WeA	3675	416521	2vwcc	sd079	1967	1:20000
Egan-Ethan complex, 2 to 6 percent slopes	EeB	1978	416490	fzd5	sd079	1967	1:20000
Egan-Beadle complex, 0 to 2 percent slopes	EbA	803	416487	fzd2	sd079	1967	1:20000
Egan silty clay loam, 3 to 6 percent slopes	EaB	29795	416638	fzjy	sd083	1971	1:20000
Egan-Chancellor silty clay loams, 0 to 4 percent slopes	EcB	13112	416639	fzjz	sd083	1971	1:20000
Egan-Shindler complex, 2 to 6 percent slopes	EsB	12312	416640	fzk0	sd083	1971	1:20000
Egan-Shindler complex, 6 to 9 percent slopes	EsC	7766	416641	fzk1	sd083	1971	1:20000
Egan-Worthing complex, 0 to 6 percent slopes	EwB	4626	416642	fzk2	sd083	1971	1:20000
Shindler-Egan complex, 9 to 15 percent slopes, eroded	SkD2	2834	416656	fzkj	sd083	1971	1:20000
Egan-Ethan complex, 5 to 9 percent slopes	EaC	8298	418024	g0zn	sd087	1976	1:20000
Egan-Trent silty clay loams, 1 to 4 percent slopes	EbB	1739	355396	cxtd	sd097	1983	1:20000
Huntimer-Egan silty clay loams, 2 to 6 percent slopes	HxB	886	355407	cxtr	sd097	1983	1:20000
Ethan-Egan complex, 3 to 7 percent slopes	EmB	527	355400	cxtj	sd097	1983	1:20000
Egan-Ethan-Trent complex, 1 to 6 percent slopes	EeB	49502	446033	gz45	sd099	1995	1:24000
Ethan-Egan complex, 6 to 9 percent slopes	EuC	27934	446041	gz4f	sd099	1995	1:24000
Egan-Wentworth-Trent complex, 2 to 6 percent slopes	EgB	20600	446035	2vwcf	sd099	1995	1:24000
Egan-Trent silty clay loams, 0 to 2 percent slopes	EfA	3107	446034	gz46	sd099	1995	1:24000
Egan-Ethan complex, 2 to 6 percent slopes	EaB	1178	446031	gz43	sd099	1995	1:24000
Ethan, very stony-Egan complex, 2 to 9 percent slopes	ExC	464	446042	gz4g	sd099	1995	1:24000
Egan-Wentworth complex, 2 to 6 percent slopes	WeB	29384	418357	2vwcd	sd101	1985	1:20000
Egan-Ethan complex, 2 to 6 percent slopes	EeB	18062	418321	g197	sd101	1985	1:20000
Ethan-Egan complex, 5 to 9 percent slopes	EtC	6303	418326	g19d	sd101	1985	1:20000
Ethan-Egan complex, 2 to 9 percent slopes, very stony	ExC	1158	418327	g19f	sd101	1985	1:20000
Egan-Ethan complex, 2 to 6 percent slopes	EeB	54029	418228	g167	sd125	1980	1:20000
Egan-Trent silty clay loams, 0 to 2 percent slopes	EfA	48343	418229	g168	sd125	1980	1:20000
Egan-Wentworth complex, 2 to 6 percent slopes	EgB	28298	418230	2vwcd	sd125	1980	1:20000
Ethan-Egan complex, 5 to 9 percent slopes	EtC	10068	418234	g16f	sd125	1980	1:20000
Ethan-Egan complex, 2 to 6 percent slopes	EtB	3053	418233	g16d	sd125	1980	1:20000
Egan-Ethan complex, 0 to 2 percent slopes	EeA	923	418227	g166	sd125	1980	1:20000
Egan-Shindler complex, 2 to 6 percent slopes	EaB	3908	453689	h734	sd127	1974	1:20000
Egan-Shindler complex, 6 to 9 percent slopes	EaC	1233	453690	h735	sd127	1974	1:20000
Egan-Ethan-Trent complex, 1 to 6 percent slopes	EbB	22115	3119206	g117	sd135	1977	1:20000
Egan-Ethan-Trent complex, 2 to 9 percent slopes	EbC	11840	418074	g118	sd135	1977	1:20000
Egan-Whitewood silty clay loams, 0 to 3 percent slopes	EdA	6025	418077	g11c	sd135	1977	1:20000
Egan-Chancellor silty clay loams, 1 to 6 percent slopes	EaB	4359	418072	g116	sd135	1977	1:20000
Egan-Wentworth complex, 2 to 6 percent slopes	EcB	3724	418076	2vwcd	sd135	1977	1:20000
Egan-Wentworth complex, 0 to 2 percent slopes	EcA	1160	418075	2vwcc	sd135	1977	1:20000
Ethan-Egan complex, 6 to 9 percent slopes	EtC	56	418125	g12x	sd135	1977	1:20000
Egan-Trent silty clay loams, 1 to 6 percent slopes	EfB	51	418122	g12t	sd135	1977	1:20000
Egan-Trent silty clay loams, 0 to 2 percent slopes	EfA	46	418121	g12s	sd135	1977	1:20000
Egan-Clarno-Trent complex, 1 to 6 percent slopes	EeB	35	418120	g12r	sd135	1977	1:20000
Egan-Wentworth complex, 2 to 6 percent slopes	EgB	4005	417963	2vwcd	sd602	1975	1:20000
Egan-Betts complex, 3 to 9 percent slopes, eroded	EbC2	1362	417962	g0xn	sd602	1975	1:20000
Egan silty clay loam, 6 to 11 percent slopes	EaC	937	417961	2vwbp	sd602	1975	1:20000

Map of Series Extent

Approximate geographic distribution of the EGAN 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).