Soil Data Explorer - DILLARD

Official Series Description

Lab Data Summary

Aggregate lab data for the DILLARD soil series. This aggregation is based on all pedons with a current taxon name of DILLARD, 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 DILLARD 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 DILLARD 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 DILLARD 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 DILLARD 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 DILLARD 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 DILLARD 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 DILLARD 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 DILLARD 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 DILLARD, 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. NC-2010-09-28-10 | Surry County - 2007

   Relationship of soils, landscape, and geology in the Fairview general soil map unit and the Colvard and Suches general soil map unit (Soil Survey of Surry County, North Carolina; 2007).

Map Units

Map units containing DILLARD 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
Dillard loam, 2 to 6 percent slopes, rarely flooded	DdB	579	1611695	1r335	ga015	2013	1:12000
Dillard fine sandy loam, 2 to 6 percent slopes	DaB	2690	531767	kvbs	ga637	1990	1:20000
Dillard sandy loam, 2 to 6 percent slopes	DhC	1890	531388	ktyk	ga651	1976	1:20000
Dillard loam, 1 to 5 percent slopes, rarely flooded	DrB	1752	1672003	1t3vl	nc021	2006	1:12000
Tusquitee-Whiteside complex, 8 to 15 percent slopes	TwC	984	1672100	1t3yq	nc021	2006	1:12000
Dillard fine sandy loam, 2 to 8 percent slopes, rarely flooded	DaB	333	116801	3xjs	nc023	2000	1:24000
Dillard fine sandy loam, 2 to 8 percent slopes, rarely flooded	DrB	110	2679220	2r92j	nc027	2012	1:12000
Thurmont-Dillard complex, 8 to 15 percent slopes	ThC	8682	2423170	2mbhs	nc039	2009	1:12000
Thurmont-Dillard complex, 2 to 8 percent slopes	ThB	5244	2423169	2mbhr	nc039	2009	1:12000
Dillard loam, 1 to 5 percent slopes, rarely flooded	DrB	1183	2423111	2mbfw	nc039	2009	1:12000
Dillard loam, 1 to 6 percent slopes, rarely flooded	DrB	665	546403	lbkx	nc043	1991	1:12000
Thurmont-Dillard complex, 2 to 8 percent slopes	ThB	1843	1912787	226dt	nc075	2007	1:12000
Dillard loam, 1 to 5 percent slopes, rarely flooded	DrB	368	1912746	226ch	nc075	2007	1:12000
Delanco (dillard) loam, 2 to 7 percent slopes	DeB	3344	546851	lc1c	nc089	1974	1:20000
Delanco (dillard) loam, 0 to 2 percent slopes	DeA	1704	546850	lc1b	nc089	1974	1:20000
Dillard loam, 2 to 8 percent slopes, rarely flooded	544B	4	2509287	2p82w	nc089	1974	1:20000
Dillard loam, 1 to 5 percent slopes, rarely flooded	DrB	479	547060	lc83	nc099	1991	1:12000
Dillard loam, 1 to 4 percent slopes, rarely flooded	DdB	1452	547186	lcd5	nc111	1989	1:24000
Dillard loam, 1 to 5 percent slopes, rarely flooded	DrB	238	545822	l9z5	nc113	1990	1:12000
Tusquitee-Whiteside complex, 8 to 15 percent slopes	TwC	1310	1671459	1t391	nc115	2006	1:12000
Dillard loam, 1 to 5 percent slopes, rarely flooded	DrB	143	1671343	1t359	nc115	2006	1:12000
Dillard sandy loam, 1 to 6 percent slopes, rarely flooded	DdB	231	111079	3ql6	nc149	1992	1:24000
Dillard fine sandy loam, 2 to 8 percent slopes, rarely flooded	DrB	1254	1427599	1jxjl	nc171	2005	1:24000
Dillard loam, 1 to 5 percent slopes, rarely flooded	DeB	1108	2390374	2l7cv	nc175	1968	1:12000
Dillard loam, 2 to 8 percent slopes, rarely flooded	544B	46	2501864	2q8n0	nc175	1968	1:12000
Dillard clay loam, 2 to 8 percent slopes, rarely flooded	DrB	885	547835	ld23	nc199	1997	1:12000
Thurmont-Dillard complex, 2 to 8 percent slopes	TdB	223	1912625	2267l	nc605	2007	1:12000
Dillard loam, 1 to 5 percent slopes, rarely flooded	DrB	139	556269	lnv5	nc605	2007	1:12000
Dillard loam, rarely flooded	Di	799	526527	knwr	tn091	2000	1:24000
Thurmont-Dillard complex, 2 to 8 percent slopes, stony	ThB	10	1414575	1jgzg	tn640	2007	1:24000
Dillard fine sandy loam, 2 to 7 percent slopes, rarely flooded	1B	1884	135944	2xx5w	va019	1985	1:24000
Dillard silt loam, 2 to 7 percent slopes	AlB	155	519178	2yztk	va035	1965	1:15840
Dillard loam, 2 to 7 percent slopes, rarely flooded	AlB	465	119781	2z1vl	va137	1966	1:15840
Dillard loam, 2 to 12 percent slopes, moderately eroded, rarely flooded	AlC2	374	119782	2z1vm	va137	1966	1:15840
Dillard loam, 0 to 2 percent slopes, rarely flooded	AlA	232	119780	2z1vk	va137	1966	1:15840
Dillard fine sandy loam, 2 to 8 percent slopes, rarely flooded	11B	1551	1473815	1lgmf	va141	2008	1:24000
Dillard fine sandy loam, 8 to 15 percent slopes	12C	801	1473816	1lgmg	va141	2008	1:24000
Dillard-Tugglesgap complex, 2 to 8 percent slopes, rarely flooded	13B	269	1474244	1lh28	va141	2008	1:24000
Dillard-Tugglesgap complex, 8 to 15 percent slopes	14C	49	1474245	1lh29	va141	2008	1:24000

Map of Series Extent

Approximate geographic distribution of the DILLARD 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).