Soil Data Explorer - GRAYS

Official Series Description

Lab Data Summary

Aggregate lab data for the GRAYS soil series. This aggregation is based on all pedons with a current taxon name of GRAYS, 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 GRAYS 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 GRAYS 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 GRAYS 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 GRAYS 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 GRAYS 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 GRAYS 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 GRAYS 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 GRAYS 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.

Soil series sharing subgroup-level classification with GRAYS, 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 GRAYS 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
Grays silt loam, 2 to 4 percent slopes	698B	1139	2108909	28shb	il031	2008	1:12000
Grays silt loam, 2 to 4 percent slopes	698B	1649	183447	64wn	il043	1998	1:12000
Grays and Markham silt loams, 2 to 4 percent slopes	979B	5629	809240	w52j	il097	2003	1:12000
Grays silt loam, 2 to 4 percent slopes	698B	3614	777740	v39d	il097	2003	1:12000
Grays silt loam, 0 to 2 percent slopes	698A	2283	777739	v39c	il097	2003	1:12000
Grays and Markham silt loams, 0 to 2 percent slopes	979A	719	809239	w52h	il097	2003	1:12000
Grays silt loam, 2 to 8 percent slopes	259B	1236	396163	f97g	mn013	1975	1:12000
Grays silt loam, 1 to 6 percent slopes	259B	807	397838	fbzh	mn047	1977	1:15840
Grays silt loam, 6 to 12 percent slopes	259C	220	397839	fbzj	mn047	1977	1:15840
Grays very fine sandy loam, 2 to 8 percent slopes	L11B	471	451614	h4y6	mn053	2001	1:12000
Grays silt loam, 2 to 6 percent slopes	259B	166	1677221	1t98x	mn123	1978	1:15840
Grays silt loam, 2 to 6 percent slopes	259B	7	1678306	1tbdx	mn163	1978	1:15840
Grays silt loam, 2 to 6 percent slopes	GrB	786	422940	g637	wi001	1978	1:20000
Grays silt loam, 6 to 12 percent slopes	GrC	160	422941	g638	wi001	1978	1:20000
Grays silt loam, 2 to 6 percent slopes	GsB	2623	753513	t92w	wi025	1972	1:15840
Grays silt loam, 6 to 12 percent slopes, eroded	GsC2	659	753514	t92x	wi025	1972	1:15840
Grays silt loam, 0 to 2 percent slopes	GsA	441	753512	t92v	wi025	1972	1:15840
Grays silt loam, 2 to 6 percent slopes	GsB	820	423787	g6zk	wi055	1976	1:15840
Grays silt loam, 2 to 6 percent slopes	GrB	3250	422548	g5pl	wi087	1975	1:15840
Grays silt loam, 0 to 2 percent slopes	GrA	2220	422547	g5pk	wi087	1975	1:15840
Grays silt loam, 2 to 6 percent slopes	GrB	1170	425725	g902	wi131	1967	1:15840
Grays silt loam, 0 to 2 percent slopes	GrA	341	425724	g901	wi131	1967	1:15840
Grays silt loam, 2 to 6 percent slopes	GrB	778	425843	g93w	wi602	1967	1:15840
Grays silt loam, 0 to 2 percent slopes	GrA	153	425842	g93v	wi602	1967	1:15840

Map of Series Extent

Approximate geographic distribution of the GRAYS 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).