Soil Data Explorer - PRATT

Official Series Description

Lab Data Summary

Aggregate lab data for the PRATT soil series. This aggregation is based on all pedons with a current taxon name of PRATT, 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 PRATT 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
74	92P0549	92KS079009	Pratt	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	37.9853237,-97.4543544
78C	87P0436	87OK059001	Pratt	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	36.6191673,-99.578331
78C	94P0721	94OK059014	Pratt	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	36.6116676,-99.5377808
79	87P0660	87KS047001	Pratt	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	37.8925018,-99.3538895
79	87P0657	87KS185001	Pratt	8	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	37.8258324,-98.7080536
79	89P0009	88KS159001	Pratt	1	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	38.1788902,-98.3211136
79	89P0010	88KS159002	Pratt	1	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	38.1814308,-98.3222961
79	89P0013	88KS159003	Pratt	1	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	38.1916656,-98.3263855
79	89P0014	88KS159004	Pratt	1	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	38.1824989,-98.3252792
79	89P0015	88KS159005	Pratt	1	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	38.1850395,-98.3225784
79	92P0548	92KS079008s	PRATT	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	37.924491,-97.5539405
79	93KS155194R	93KS155194R	Pratt	1	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	37.896389,-98.4400558
79	06N0254	S05KS155001	Pratt	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	37.8546906,-98.4460907
79	40A1802	S1958KS155006	PRATT	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	37.9722214,-98.4011078
79	40A1803	S1958KS155012	PRATT	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	38.005043,-98.3986893

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the PRATT 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 PRATT series. Sketches are arranged according to their subgroup-level taxonomic structure. Source: SSURGO snapshot (updated 2024-10-24), parsed OSD records (updated 2025-02-20) and snapshot of SC database (updated 2025-02-20).

Select annual climate data summaries for the PRATT 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 2024-10-23).

Geomorphic description summaries for the PRATT 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 2024-10-23).

There are insufficient data to create the 3D mountains figure.

Competing Series

Soil series competing with PRATT share the same family level classification in Soil Taxonomy. Source: parsed OSD records (updated 2025-02-20) and snapshot of the SC database (updated 2025-02-20).

Select annual climate data summaries for the PRATT 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 2024-10-23).

Geomorphic description summaries for the PRATT 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 2024-10-23).

There are insufficient data to create the 2D hillslope position figure.

There are insufficient data to create the 3D hills figure.

There are insufficient data to create the 3D mountains figure.

There are insufficient data to create the 3D terrace figure.

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

Soil series sharing subgroup-level classification with PRATT, 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 2025-02-20).

Block Diagrams

Click a link below to display the diagram. Note that these diagrams may be from multiple survey areas.

1. KS-2010-09-03-01 | Reno County - 2002

   Typical pattern of soils and parent material in the Tivin-Hayes-Pratt association (Soil Survey of Reno County, Kansas; 2002).

2. KS-2012-01-20-26 | Clark County - December 1982

   Typical pattern of soils in the Pratt-Tivoli-Kingsdown association (Soil Survey of Clark County, Kansas; 1982).

3. KS-2012-01-20-39 | Comanche County - June 1989

   Typical pattern of soils and parent material in the Pratt-Tivoli-Kingsdown association (Soil Survey of Comanche County, Kansas; 1989).

4. KS-2012-01-20-47 | Edwards County - September 1973

   Typical pattern of soils in association 4 (Soil Survey of Edwards County, Kansas; 1973).

5. KS-2012-01-20-49 | Edwards County - September 1973

   Pattern of soils in associations 1, 3, and 7. Association 1 is to the left of Big Coon Creek. Association 7 extends from Big Coon Creek to the Arkansas River. Association 3 is to the right of the Arkansas River (Soil Survey of Edwards County, Kansas; 1973).

6. KS-2012-01-20-50 | Edwards County - September 1973

   Approximate geologic cross section (south to north) through dune-sand area (6) (Soil Survey of Edwards County, Kansas; 1973).

7. KS-2012-01-23-05 | Ford County - August 1965

   A geologic cross section west of Dodge City showing the major soil associations in Ford County (Soil Survey of Ford County, Kansas; 1965).

8. KS-2012-01-23-18 | Gray County - January 1968

   Soils of the Mansic-Ulysses soil association are on the right; on the left are soils of the Pratt-Tivoli soil association (Soil Survey of Gray County, Kansas; 1968).

9. KS-2012-01-23-19 | Gray County - January 1968

   Soils of the Manter-Satanta soil association (Soil Survey of Gray County, Kansas; 1968).

10. KS-2012-01-23-20 | Gray County - January 1968

    Approximate geologic cross section through the central part of Gray County and the general location of soils on the landscape (Soil Survey of Gray County, Kansas; 1968).

11. KS-2012-01-24-14 | McPherson County - April 1983

    Typical pattern of soils in the Carwile-Attica association (Soil Survey of McPherson County, Kansas; 1983).

12. KS-2012-01-25-13 | Pratt County - September 1968

    Major soils of associations 1 and 2 and the positions they normally occupy on the landscape (Soil Survey of Pratt County, Kansas; 1968).

13. KS-2012-01-25-27 | Rice County - December 1974

    Distribution of the soils in the Carwile-Farnum-Tabler and Canadian-Kaski-Platte associations (Soil Survey of Rice County, Kansas; 1974).

14. OK-2012-02-16-03 | Beaver County - August 1962

    Parent material and parent rock of most of the soils in Beaver County, and their position on the landscape (Soil Survey of Beaver County, Oklahoma; August 1962).

15. OK-2012-02-16-05 | Blaine County - February 1968

    Typical pattern of soils in associations 7 and 8 (Soil Survey of Blaine County, Oklahoma; February 1968).

16. OK-2012-02-16-21 | Cotton County - December 1963

    Typical pattern of Pratt, Tivoli, and associated soils (Soil Survey of Cotton County, Oklahoma; December 1963).

17. OK-2012-02-16-25 | Dewey County - December 1963

    Typical pattern of the dominant soils in association 3 (Soil Survey of Dewey County, Oklahoma; December 1963).

18. OK-2012-02-16-26 | Dewey County - December 1963

    Typical pattern of the soils in association 4 (Soil Survey of Dewey County, Oklahoma; December 1963).

19. OK-2012-02-16-30 | Ellis County - April 1966

    Major soils of associations 7, 8, and 10 (Soil Survey of Ellis County, Oklahoma; April 1966).

20. OK-2012-02-16-31 | Garfield County - October 1967

    Typical pattern of soils in the Pratt-Carwile-Shellabarger soil association (Soil Survey of Garfield County, Oklahoma; October 1967).

21. OK-2012-02-16-46 | Harper County - June 1960

    A schematic drawing showing a normal pattern of soils formed on alluvial plains and on windblown sands. The typical slope range is given for each soil (Soil Survey of Harper County, Oklahoma; June 1960).

22. OK-2012-02-17-11 | Major County - October 1968

    Soil associations in the eastern part of the county (Soil Survey of Major County, Oklahoma; October 1968).

23. OK-2012-02-17-12 | Major County - October 1968

    Soil associations in the central part of the county (Soil Survey of Major County, Oklahoma; October 1968).

24. OK-2012-02-17-13 | Major County - October 1968

    Cross section along a line extending across the middle of the county from the western to the eastern boundary (Soil Survey of Major County, Oklahoma; October 1968).

25. OK-2012-02-17-40 | Roger Mills County - August 1963

    Typical pattern of soils in associations 3, 4, and 5 (Soil Survey of Roger Mills County, Oklahoma; August 1963).

26. OK-2012-02-17-59 | Woodward County - November 1963

    Typical pattern of soils of the Pratt association (Soil Survey of Woodward County, Oklahoma; November 1963).

27. OK-2012-02-17-61 | Woodward County - November 1963

    Typical pattern of soils of the Lincoln-Las Animas association (Soil Survey of Woodward County, Oklahoma; November 1963).

28. TX-2012-03-22-03 | Wheeler County - October 1975

    Relationship of soils in the Grandfield-Devol association to parent material and relief (Soil Survey of Wheeler County, TX; 1975).

29. TX-2012-03-22-04 | Wheeler County - October 1975

    Relationship of soils in the Devol-Tivoli association to parent material and relief (Soil Survey of Wheeler County, TX; 1975).

30. TX-2012-03-22-05 | Wheeler County - October 1975

    Relationship of soils in the Pratt-Delwin association to parent material and relief (Soil Survey of Wheeler County, TX; 1975).

Map Units

Map units containing PRATT 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
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	3582	1382514	1hdm7	ks007	1973	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	2276	2768231	2r8yr	ks007	1973	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	617	2768230	2r9c6	ks007	1973	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	21828	2768233	2r9c6	ks009	1979	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	5212	2768234	2r8yr	ks009	1979	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	4656	1440496	2ww14	ks009	1979	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	1043	1381738	1hct6	ks025	1980	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	542	2768238	2r9c6	ks025	1980	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	8510	2768244	2r9c6	ks033	1987	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	5663	1381284	1hcbk	ks033	1987	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	1178	2768245	2r8yr	ks033	1987	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	163	2768246	2r8yr	ks035	1977	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	28356	1380389	2ww14	ks047	1967	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	27316	2768247	2r9c6	ks047	1967	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	16460	2768248	2r8yr	ks047	1967	1:24000
Pratt-Lincoln loamy fine sands, 0 to 4 percent slopes	5938	1247	1380388	2zt7f	ks047	1967	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	19595	1380461	2ww14	ks057	1962	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	6412	2768251	2r8yr	ks057	1962	1:24000
Pratt-Humbarger complex, 0 to 15 percent slopes	5937	1973	1380460	307pq	ks057	1962	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	460	2768250	2r9c6	ks057	1962	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	43079	2768253	30r5k	ks069	1965	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	24352	1468906	30r5l	ks069	1965	1:24000
Pratt loamy fine sand, gravel substratum, 0 to 1 percent slopes	5930	525	1380591	1hbm6	ks069	1965	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	5263	2768254	2r8yr	ks077	1965	1:24000
Pratt loamy fine sand, siltstone substratum, 3 to 8 percent slopes	5931	2197	1382723	1hdtz	ks077	1965	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	24	1382725	1hdv1	ks077	1965	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	3386	1155458	2ww14	ks079	1970	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	3159	2768256	2r9c6	ks079	1970	1:24000
Pratt-Turon fine sands, 1 to 5 percent slopes	5942	40	2768258	2r8yw	ks079	1970	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	8062	2768261	2r9c6	ks095	1977	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	4469	1444802	2ww14	ks095	1977	1:24000
Pratt-Turon fine sands, 1 to 5 percent slopes	5942	219	2768264	2r8yw	ks095	1977	1:24000
Pratt fine sand, 5 to 10 percent slopes	5927	16	2768260	2r8ys	ks095	1977	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	7	2768262	2r8yr	ks095	1977	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	52233	2768265	2r9c6	ks097	1983	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	34828	1380539	2ww14	ks097	1983	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	23972	2768266	2r8yr	ks097	1983	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	291	2768270	2r8yr	ks113	1980	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	93	2768269	2r9c6	ks113	1980	1:24000
Pratt-Turon fine sands, 1 to 5 percent slopes	5942	1	2768272	2r8yw	ks113	1980	1:24000
Pratt loamy sand, 5 to 12 percent slopes	5932	1728	2768273	2r8yt	ks143	1978	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	21015	2768274	2r9c6	ks145	1976	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	8128	1380144	2ww14	ks145	1976	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	5393	2768275	2r8yr	ks145	1976	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	13178	2768278	2r9c6	ks151	1965	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	3022	2768279	2r8yr	ks151	1965	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	1733	1445161	2ww14	ks151	1965	1:24000
Pratt-Turon fine sands, 1 to 5 percent slopes	5942	117	2768281	2r8yw	ks151	1965	1:24000
Pratt fine sand, 5 to 10 percent slopes	5927	43	2768277	2r8ys	ks151	1965	1:24000
Pratt-Turon fine sands, 1 to 5 percent slopes	5942	25579	2768286	2r8yw	ks155	1999	1:24000
Pratt fine sand, 5 to 10 percent slopes	5927	4530	2768285	2r8ys	ks155	1999	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	11471	2768293	2r9c6	ks159	1971	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	1674	1433298	2ww14	ks159	1971	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	1039	2768294	2r8yr	ks159	1971	1:24000
Pratt-Turon fine sands, 1 to 5 percent slopes	5942	655	2768296	2r8yw	ks159	1971	1:24000
Pratt fine sand, 5 to 10 percent slopes	5927	25	2768292	2r8ys	ks159	1971	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	6655	2768302	2r9c6	ks173	1976	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	2374	1443985	2ww14	ks173	1976	1:24000
Pratt loamy fine sand, 1 to 5 percent slopes	5928	60763	2768305	2r9c6	ks185	1975	1:24000
Pratt-Tivoli loamy fine sands, 5 to 15 percent slopes	5941	24146	1443669	2ww14	ks185	1975	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	16994	2768306	2r8yr	ks185	1975	1:24000
Pratt-Turon fine sands, 1 to 5 percent slopes	5942	313	2768308	2r8yw	ks185	1975	1:24000
Pratt fine sand, 5 to 10 percent slopes	5927	48	2768304	2r8ys	ks185	1975	1:24000
Pratt loamy fine sand, 5 to 12 percent slopes	5929	2061	2768310	2r8yr	ks191	1974	1:24000

Map of Series Extent

Approximate geographic distribution of the PRATT 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 2024-10-30).