Soil Data Explorer - TEKOA

Official Series Description

Lab Data Summary

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

There are insufficient data to create the 3D flats position figure.

Competing Series

Soil series competing with TEKOA 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 TEKOA 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 TEKOA 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 flats position figure.

Soil series sharing subgroup-level classification with TEKOA, 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. WA-2012-05-11-09 | Whitman County - April 1980

   Typical landscape in the Palouse-Thatuna-Tekoa association (Soil Survey of Whitman County, Washington; April 1980).

Map Units

Map units containing TEKOA 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
Tekoa gravelly silt loam, deep, 25 to 55 percent slopes	Tk6j	56	2502067	2981	id057	2013	1:24000
McCrosket-Tekoa association, 12 to 60 percent slopes	148	12799	79438	2v72b	id606	1976	1:24000
Tekoa gravelly silt loam, 20 to 35 percent slopes	190	2068	79480	2npw	id606	1976	1:24000
Tekoa gravelly silt loam, 35 to 65 percent slopes	191	1044	79481	2npx	id606	1976	1:24000
Tekoa gravelly silt loam, 5 to 20 percent slopes	189	921	79479	2npv	id606	1976	1:24000
Tekoa silt loam, 5 to 35 percent slopes, extremely stony	192	423	79482	2npy	id606	1976	1:24000
Schumacher-Tekoa complex, 25 to 45 percent slopes	611	47	2662989	1hncc	id606	1976	1:24000
McCrosket-Tekoa association, 12 to 60 percent slopes	712	492	1390050	2v72b	id620	2013	1:24000
Schumacher-Tekoa complex, 25 to 45 percent slopes	611	305	1389958	1hncc	id620	2013	1:24000
Libertybutte-Tekoa complex, 5 to 30 percent slopes	612	95	1389959	1hncd	id620	2013	1:24000
Tekoa gravelly ashy silt loam, 15 to 40 percent slopes	617	26	1389968	1hncp	id620	2013	1:24000
McCrosket-Tekoa association, 12 to 60 percent slopes	2v72b	1580	2936638	2v72b	id670		1:24000
Tekoa gravelly silt loam, 35 to 65 percent slopes	2npx	67	2936654	2npx	id670		1:24000
Tekoa gravelly silt loam, 20 to 35 percent slopes	2npw	34	2936635	2npw	id670		1:24000
Tekoa gravelly silt loam, 5 to 20 percent slopes	2npv	33	2851015	2npv	id670		1:24000
Tekoa gravelly ashy silt loam, 15 to 40 percent slopes	9617	1027	2230233	2dvr0	wa063	2012	1:24000
Libertybutte-Tekoa complex, 5 to 30 percent slopes	9612	884	2230230	2dvqx	wa063	2012	1:24000
McCrosket-Tekoa association, 12 to 60 percent slopes	9712	400	2230240	2v72b	wa063	2012	1:24000
Schumacher-Tekoa complex, 25 to 40 percent slopes	9611	388	2230229	2dvqw	wa063	2012	1:24000
Tekoa silt loam, 3 to 25 percent slopes	98	2782	68599	29cw	wa075	1975	1:20000
Tekoa stony silt loam, 25 to 40 percent slopes	102	1929	68481	2982	wa075	1975	1:20000
Tekoa gravelly silt loam, 25 to 55 percent slopes	100	1168	68479	2980	wa075	1975	1:20000
Tekoa gravelly silt loam, deep, 25 to 55 percent slopes	101	928	68480	2981	wa075	1975	1:20000
Tekoa silt loam, 25 to 40 percent slopes	99	309	68600	29cx	wa075	1975	1:20000
McCrosket-Tekoa association, 12 to 60 percent slopes	9712	102	2651387	2v72b	wa075	1975	1:20000
Libertybutte-Tekoa complex, 5 to 30 percent slopes	9612	37	2651384	2dvqx	wa075	1975	1:20000
Tekoa gravelly ashy silt loam, 15 to 40 percent slopes	9617	6	2651385	2dvr0	wa075	1975	1:20000

Map of Series Extent

Approximate geographic distribution of the TEKOA 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).