Soil Data Explorer - HUMPHREYS

Official Series Description

Lab Data Summary

Aggregate lab data for the HUMPHREYS soil series. This aggregation is based on all pedons with a current taxon name of HUMPHREYS, 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 HUMPHREYS were used in the calculation. Source: KSSL snapshot (updated 2020-03-18). 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
122	01P0461	1900TN135001	Humphreys	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	35.6800003,-87.8874969
122	98P0366	1998TN135001	Humphreys	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	35.7525291,-87.8072815

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the HUMPHREYS 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 HUMPHREYS 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 HUMPHREYS 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 HUMPHREYS 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 HUMPHREYS 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 HUMPHREYS 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 HUMPHREYS 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 HUMPHREYS, 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. KY-2012-01-26-01 | Adair County - April 1964

   Diagram of the Westmoreland-Caneyville-Baxter association in Adair County (Soil Survey of Adair County, Kentucky; April 1964).

2. KY-2012-01-26-02 | Adair County - April 1964

   Diagram of the Baxter-Christian-Bewleyville association (Soil Survey of Adair County (Soil Survey of Adair County, Kentucky; April 1964).

3. KY-2012-01-26-05 | Adair County - April 1964

   Diagram of the Staser-Taft-Landisburg association on flood plains, terraces, and foot slopes (Soil Survey of Adair County (Soil Survey of Adair County, Kentucky; April 1964).

4. KY-2012-01-26-06 | Adair County - April 1964

   Geological cross section of Adair County showing the relationship of the soils to the underlying rocks (Soil Survey of Adair County (Soil Survey of Adair County, Kentucky; April 1964).

5. TN-2010-11-02-08 | Hickman County - 2008

   Typical pattern of soils and parent material in the Humphreys-Riverby-Tarklin and Biffle Sengtown general soil map units (Soil Survey of Hickman County, Tennessee; 2008).

6. TN-2010-11-02-16 | Lewis County - 2006

   Typical pattern of soils and parent material in the Humphreys-Riverby-Trace general soil map unit (Soil Survey of Lewis County, Tennessee; 2006).

7. TN-2010-11-02-25 | Moore County - 2006

   Typical pattern of soils and parent material in the Etowah-Trace-Ellisville general soil map unit (Soil Survey of Moore County, Tennessee; 2006).

8. TN-2012-03-16-06 | Dickson County - 2002

   The relationship of soils, landscape, and parent material in the Saffell-Lax and the Armour-Humphreys-Sullivan general soil map units (Soil Survey of Dickson County, TN; 2002).

9. TN-2012-03-19-05 | Hardin County - June 1963

   Major soil series in soil associations 8 and 10 and their relationship to the landscape (Soil Survey of Hardin County, TN; 1963).

10. TN-2012-03-19-34 | Wayne County - 2000

    Typical pattern of soils and parent material in the Biffle-Sulphura-Ironcity general soil map unit (Soil Survey of Wayne County, TN; 2000).

11. TN-2012-03-19-38 | Williamson County - August 1964

    Major and minor soils and underlying parent materials in the Mountview-Baxter-Bodine association (Soil Survey of Williamson County, TN; 1964).

Map Units

Map units containing HUMPHREYS 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
Humphreys cherty silt loam	Hu	888	523051	kk8m	al077	1973	1:20000
Humphreys silt loam level phase	Hmv	3264	522784	kk00	al083	1953	1:20000
Humphreys cherty silt loam undulating phase	Hru	1452	522785	kk01	al083	1953	1:20000
Humphreys cherty silt loam	Hw	2911	523156	kkd0	al089	1958	1:24000
Humphreys silt loam	Hx	2443	523157	kkd1	al089	1958	1:24000
Humphreys cherty silt loam, 6 to 12 percent slopes, eroded	HcC2	1505	549766	lg2d	ky169	1965	1:15840
Humphreys cherty silt loam, 2 to 6 percent slopes	HcB	737	549764	lg2b	ky169	1965	1:15840
Humphreys cherty silt loam, 6 to 12 percent slopes	HcC	411	549765	lg2c	ky169	1965	1:15840
Humphreys cherty silt loam, 6 to 12 percent slopes, eroded	HuC2	2472	2452990	2nbjq	ky646	1966	1:15840
Humphreys cherty silt loam, 2 to 6 percent slopes	HuB	970	2452989	2nbjp	ky646	1966	1:15840
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	1795	2545347	2qsg7	tn005	2011	1:12000
Humphreys gravelly silt loam, 5 to 12 percent slopes	HuC	908	2545348	2qsg8	tn005	2011	1:12000
Humphreys gravelly silt loam, 0 to 3 percent slopes, rarely flooded	HuA	179	2545346	2qsg5	tn005	2011	1:12000
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	315	527016	kpdj	tn021	1991	1:24000
Humphreys gravelly silt loam, 5 to 12 percent slopes	HuC	232	527017	2qh71	tn021	1991	1:24000
Humphreys gravelly silt loam, 5 to 12 percent slopes	HuC	343	636811	2qh71	tn027	2002	1:24000
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	98	636810	2qh70	tn027	2002	1:24000
Humphreys gravelly silt loam, 2 to 5 percent slopes	Hr	809	524924	2qh70	tn031	1956	1:20000
Humphreys cherty silt loam, 1 to 4 percent slopes	HuB	2067	523420	kknj	tn037	1977	1:15840
Humphreys cherty silt loam, undulating phase	Gb	3518	327312	bzlg	tn039	2008	1:24000
Humphreys cherty silt loam, rolling phase	Ga	397	327311	bzlf	tn039	2008	1:24000
Humphreys cherty silt loam	Hd	224	327316	bzll	tn039	2008	1:24000
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	4452	527110	2qh70	tn043	1993	1:24000
Humphreys gravelly silt loam, 0 to 2 percent slopes, occasionally flooded	HuA	2654	527109	kphj	tn043	1993	1:24000
Humphreys gravelly silt loam, 5 to 12 percent slopes	HuC	2097	527111	2qh71	tn043	1993	1:24000
Humphreys cherty silt loam	Hk	521	527213	kplw	tn051	1950	1:20000
Humphreys cherty silt loam, 5 to 12 percent slopes	HuC	378	527324	kpqg	tn055	1965	1:15840
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	215	527323	2qh70	tn055	1965	1:15840
Humphreys cherty silt loam, 1 to 6 percent slopes	HuB	804	1017866	1355d	tn065	1980	1:15840
Humphreys cherty silt loam, 2 to 5 percent slopes, eroded	HcB2	507	327576	bzvz	tn071	1961	1:15840
Humphreys gravelly silt loam, 5 to 12 percent slopes	HuC	96	2545263	2qs87	tn079	2012	1:12000
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	75	2545262	2qs86	tn079	2012	1:12000
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	11489	527469	2qh70	tn081	1997	1:24000
Tarklin-Humphreys complex, 5 to 12 percent slopes, eroded	ThC2	10228	527493	kpwx	tn081	1997	1:24000
Humphreys gravelly silt loam, 0 to 2 percent slopes, occasionally flooded	HuA	104	527468	kpw3	tn081	1997	1:24000
Humphreys gravelly silt loam, 2 to 5 percent slopes	Ha	965	527523	2qh70	tn083	1952	1:20000
Humphreys gravelly silt loam, 2 to 5 percent slopes	Hg	33242	527569	2qh70	tn085	1943	1:20000
Humphreys gravelly silt loam, 5 to 12 percent slopes	HuC	773	530196	2qh71	tn087	1999	1:24000
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	550	530195	2qh70	tn087	1999	1:24000
Humphreys cherty silt loam	Ha	700	527648	kq1x	tn099	1955	1:20000
Tarklin-Humphreys complex, 5 to 12 percent slopes, eroded	TmC2	3186	530886	ktfc	tn101	1999	1:24000
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	1958	530861	2qh70	tn101	1999	1:24000
Humphreys gravelly silt loam, 5 to 12 percent slopes	HuC	1752	530862	2qh71	tn101	1999	1:24000
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	2506	527704	2qh70	tn111	1992	1:24000
Humphreys gravelly silt loam, 5 to 12 percent slopes	HuC	417	527705	2qh71	tn111	1992	1:24000
Humphreys gravelly silt loam, 5 to 12 percent slopes	Ab	3588	527725	2qh71	tn119	1955	1:20000
Humphreys gravelly silty clay loam, 5 to 12 percent slopes, severely eroded	HpC2	2331	2749930	2qh7j	tn119	1955	1:20000
Humphreys gravelly silt loam, 2 to 5 percent slopes	Aa	2046	527724	2qh70	tn119	1955	1:20000
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	2504	527985	2qh70	tn125	1972	1:15840
Humphreys gravelly silt loam, 5 to 12 percent slopes	HuC	603	625745	2qh71	tn127	2002	1:24000
Humphreys gravelly silt loam, 5 to 12 percent slopes	HuC	204	843237	2qh71	tn133	2003	1:24000
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	44	843236	2qh70	tn133	2003	1:24000
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	7130	560624	2qh70	tn135	2000	1:24000
Humphreys gravelly silt loam, 0 to 3 percent slopes, rarely flooded	HuA	3261	560623	ltcm	tn135	2000	1:24000
Tarklin-Humphreys complex, 5 to 12 percent slopes, eroded	ThC2	20	560655	ltdn	tn135	2000	1:24000
Humphreys gravelly silt loam, 5 to 12 percent slopes	HuC	9	560625	2qh71	tn135	2000	1:24000
Humphreys gravelly silt loam, 5 to 12 percent slopes	HcC	657	528176	2qh71	tn147	1965	1:15840
Humphreys gravelly silt loam, 2 to 5 percent slopes	HcB	318	528175	2qh70	tn147	1965	1:15840
Humphreys gravelly silt loam, 2 to 5 percent slopes	Ga	9943	2396906	2qh70	tn161	1953	1:20000
Humphreys gravelly silt loam, 1 to 5 percent slopes	HmB	666	3160454	1ttwv	tn161	1953	1:20000
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	1984	528362	2qh70	tn165	1993	1:20000
Humphreys gravelly silt loam, 2 to 8 percent slopes, rarely flooded	HuB	194	530024	ksjk	tn169	1993	1:24000
Humphreys gravelly silt loam, 5 to 12 percent slopes	HuC	10745	328016	c0b5	tn181	1996	1:24000
Humphreys gravelly silt loam, 2 to 5 percent slopes	HuB	7671	328015	c0b4	tn181	1996	1:24000
Humphreys gravelly silt loam, 5 to 12 percent slopes	HpC	3958	2749929	2qh71	tn187	1961	1:15840
Humphreys gravelly silt loam, 2 to 5 percent slopes	HpB	1275	2749917	2qh70	tn187	1961	1:15840
Humphreys gravelly silty clay loam, 5 to 12 percent slopes, severely eroded	AmC3	227	523453	2qh7j	tn187	1961	1:15840

Map of Series Extent

Approximate geographic distribution of the HUMPHREYS 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).