Soil Data Explorer - EAPA

Official Series Description

Lab Data Summary

Aggregate lab data for the EAPA soil series. This aggregation is based on all pedons with a current taxon name of EAPA, 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 EAPA 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
58A	00P1145	S2000MT017001	Eapa	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	46.3060837,-105.9767532
58A	13N97460	S2013MT017001	Eapa	8	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	46.2352083,-106.0369194
58D	83P0024	82SD063001	Eapa	8	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	45.4099998,-103.8269424

Water Balance

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

Competing Series

Soil series competing with EAPA 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 EAPA 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 EAPA 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 EAPA, 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-2012-03-15-74 | Meade County, Northern Part - January 1986

   Pattern of soils and parent material in the Cabbart-Delridge association (Soil Survey of Meade County, Northern Part, SD; 1986).

Map Units

Map units containing EAPA 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
Eapa loam, 2 to 8 percent slopes	84C	92002	343255	2tvln	mt011	1992	1:24000
Eapa loam, 0 to 2 percent slopes	84A	16352	343254	2v2ks	mt011	1992	1:24000
Eapa-Yamacall loams, 2 to 8 percent slopes	167C	8079	342946	chvs	mt011	1992	1:24000
Eapa-Archin loams, 2 to 8 percent slopes	184C	7468	342988	chx4	mt011	1992	1:24000
Eapa loam, 8 to 15 percent slopes	84D	1973	343256	cj5s	mt011	1992	1:24000
Eapa loam, warm, 1 to 6 percent slopes	603C	977	343162	cj2r	mt011	1992	1:24000
Eapa loam, 2 to 8 percent slopes	41C	20821	343440	2tvln	mt017	1995	1:24000
Chinook-Twilight-Eapa complex, 2 to 8 percent slopes	355C	13563	343403	cjbj	mt017	1995	1:24000
Eapa loam, 0 to 2 percent slopes	41A	5477	343439	2v2ks	mt017	1995	1:24000
Eapa loam, 0 to 4 percent slopes	654B	295	343614	cjkb	mt017	1995	1:24000
Eapa-Delpoint loams, 2 to 8 percent slopes	969C	90	343820	cjrz	mt017	1995	1:24000
Kremlin-Eapa loams, 0 to 4 percent slopes	501B	14044	754481	tb33	mt021	1971	1:24000
Eapa loam, 0 to 4 percent slopes	30B	1001	754476	tb2y	mt021	1971	1:24000
Eapa loam, 2 to 8 percent slopes	84C	35487	342298	2tvln	mt025	1991	1:24000
Eapa-Yamacall loams, 2 to 8 percent slopes	167C	5096	342118	ch02	mt025	1991	1:24000
Eapa loam, 0 to 2 percent slopes	84A	4093	342297	2v2ks	mt025	1991	1:24000
Eapa loam, 8 to 15 percent slopes	84D	628	342299	ch5x	mt025	1991	1:24000
Chinook-Twilight-Eapa complex, 2 to 8 percent slopes	383C	32667	342644	chk1	mt033	2002	1:24000
Eapa loam, 4 to 8 percent slopes	48C	23864	342657	chkg	mt033	2002	1:24000
Eapa loam, 0 to 4 percent slopes	48B	22895	342656	chkf	mt033	2002	1:24000
Eapa loam, 0 to 2 percent slopes	481A	337	342741	2v2ks	mt033	2002	1:24000
Eapa loam, 2 to 8 percent slopes	481C	72	339734	2tvln	mt033	2002	1:24000
Eapa-Gerdrum complex, 2 to 8 percent slopes	62	4724	344427	ckdk	mt055	1981	1:24000
Eapa loam, 2 to 8 percent slopes	61	2537	344426	2tvln	mt055	1981	1:24000
Eapa loam, 0 to 2 percent slopes	60	1796	344425	2v2ks	mt055	1981	1:24000
Eapa loam, 2 to 8 percent slopes	52B	7655	344596	cgkh	mt065	1996	1:24000
Eapa-Attewan loams, 0 to 2 percent slopes	152A	3124	344485	cghw	mt065	1996	1:24000
Eapa loam, 0 to 2 percent slopes	52A	1607	344595	cgkg	mt065	1996	1:24000
Evanston loam, 2 to 6 percent slopes	51	1280	344940	cky3	mt079	1986	1:24000
Evanston-Delpoint loams, 2 to 8 percent slopes	52	1202	344941	cky4	mt079	1986	1:24000
Evanston loam, 0 to 2 percent slopes	50	804	344937	cky0	mt079	1986	1:24000
Kremlin-Eapa loams, 0 to 4 percent slopes	146	319	1145695	17g5x	mt079	1986	1:24000
Kremlin-Eapa loams, 0 to 4 percent slopes	501B	1158	1711692	1vg4w	mt083	1973	1:24000
Eapa loam, 0 to 4 percent slopes	30B	298	1677535	1t9m1	mt109	1956	1:31680
Eapa loam, calcareous, 0 to 8 percent slopes	152B	118	2396643	cghx	mt111	1966	1:20000
Eapa loam, 4 to 8 percent slopes	830C	4519	2434245	2mq11	mt624	2021	1:24000
Eapa loam, 0 to 4 percent slopes	830B	2351	2434242	2mq0y	mt624	2021	1:24000
Eapa-Attewan loams, 0 to 2 percent slopes	152A	1428	2513996	cghw	mt624	2021	1:24000
Eapa loam, calcareous surface, 0 to 8 percent slopes	816C	840	1949510	23fmf	mt624	2021	1:24000
Eapa loam, 8 to 15 percent slopes	830D	481	2610251	2r8d0	mt624	2021	1:24000
Eapa loam, 0 to 2 percent slopes	52A	63	2513978	cgkg	mt624	2021	1:24000
Eapa loam, 2 to 8 percent slopes	52B	53	2513979	cgkh	mt624	2021	1:24000
Eapa loam, 2 to 8 percent slopes	52B	586	1712548	1vh1h	mt655	1975	1:24000
Eapa loam, calcareous, 0 to 8 percent slopes	152B	209	1712538	1vh15	mt655	1975	1:24000
Eapa loam, 2 to 8 percent slopes	52B	8299	341697	cgkh	mt666	2008	1:24000
Eapa-Attewan loams, 0 to 2 percent slopes	152A	2146	341647	cghw	mt666	2008	1:24000
Eapa loam, 0 to 2 percent slopes	52A	2053	341696	cgkg	mt666	2008	1:24000
Eapa-Attewan loams, 0 to 2 percent slopes, fan	352A	1852	1711527	1vfzk	mt666	2008	1:24000
Eapa loam, calcareous, 0 to 8 percent slopes	152B	351	341648	cghx	mt666	2008	1:24000
Marmarth-Eapa loams, 0 to 6 percent slopes	L2819B	141	2563482	2qxl0	nd011	1969	1:20000
Marmarth-Eapa loams, 0 to 6 percent slopes	L2819B	18	2715921	2qxl0	nd087	1974	1:20000
Eapa-Archin complex, 0 to 3 percent slopes	EcA	6879	355738	2zj50	sd063	1984	1:24000
Eapa loam, 0 to 3 percent slopes	EaA	4684	355737	2zj4z	sd063	1984	1:24000
Eapa-Grail complex, 2 to 6 percent slopes	EgB	30729	355436	cxvp	sd601	1983	1:24000
Eapa loam, 2 to 6 percent slopes	EaB	21378	355432	cxvk	sd601	1983	1:24000
Eapa-Delridge loams, 2 to 6 percent slopes	EdB	19979	355434	cxvm	sd601	1983	1:24000
Eapa-Grail complex, 6 to 9 percent slopes	EgC	14776	355437	cxvq	sd601	1983	1:24000
Eapa-Delridge loams, 6 to 9 percent slopes	EdC	12058	355435	cxvn	sd601	1983	1:24000
Eapa loam, 0 to 2 percent slopes	EaA	3313	355431	cxvj	sd601	1983	1:24000
Eapa loam, 6 to 9 percent slopes	EaC	2183	355433	cxvl	sd601	1983	1:24000

Map of Series Extent

Approximate geographic distribution of the EAPA 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).