Soil Data Explorer - HORSEFLAT

Official Series Description

Lab Data Summary

Aggregate lab data for the HORSEFLAT soil series. This aggregation is based on all pedons with a current taxon name of HORSEFLAT, 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 HORSEFLAT were used in the calculation. Source: KSSL snapshot (updated 2020-03-13). 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 HORSEFLAT 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 HORSEFLAT series. Sketches are arranged according to their subgroup-level taxonomic structure. Source: SSURGO snapshot (updated 2024-02-21), parsed OSD records (updated 2023-10-02) and snapshot of SC database (updated 2023-10-02).

Select annual climate data summaries for the HORSEFLAT 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 HORSEFLAT 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.

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 HORSEFLAT share the same family level classification in Soil Taxonomy. Source: parsed OSD records (updated 2023-10-02) and snapshot of the SC database (updated 2023-10-02).

Select annual climate data summaries for the HORSEFLAT 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 HORSEFLAT 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 terrace figure.

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

Soil series sharing subgroup-level classification with HORSEFLAT, 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-2010-11-05-01 | Douglas County - 2008

   Cross-section view of soils that formed in residuum and colluvium or loess over older loess over basalt and receive 9 to 12 inches of precipitation (Soil Survey of Douglas County, Washington; 2008).

2. WA-2012-05-11-42 | Douglas County - May 2008

   Cross-section of soils that formed in residuum and colluvium or loess over older loess over basalt and receive 9 to 12 inches of precipitation (Soil Survey of Douglas County, Washington; May 2008).

Map Units

Map units containing HORSEFLAT 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
Argabak-Horseflat complex, 0 to 30 percent slopes	25	12200	699279	rgnd	wa017	1998	1:12000
Argabak-Horseflat-Toler complex, 0 to 20 percent slopes	26	12011	704317	rmwx	wa017	1998	1:12000
Zen-Argabak-Horseflat complex, 0 to 20 percent slopes	493	8638	704315	rmwv	wa017	1998	1:12000
Argabak-Horseflat-Zen complex, 0 to 20 percent slopes	27	7361	699281	rgng	wa017	1998	1:12000
Toler-Horseflat complex, 3 to 8 percent slopes	420	7095	704475	rn20	wa017	1998	1:12000
Toler-Horseflat-Ralls complex, 8 to 15 percent slopes	424	6540	704473	rn1y	wa017	1998	1:12000
Toler-Horseflat complex, 8 to 15 percent slopes	421	5098	704476	rn21	wa017	1998	1:12000
Winblow-Argabak-Horseflat complex, 0 to 20 percent slopes	485	4722	704105	rmp2	wa017	1998	1:12000
Toler-Horseflat-Benwy complex, 3 to 8 percent slopes	423	3687	704472	rn1x	wa017	1998	1:12000
Toler-Horseflat-Ralls complex, 15 to 30 percent slopes	425	2660	704474	rn1z	wa017	1998	1:12000
Toler-Horseflat complex, 15 to 30 percent slopes	422	960	699581	rgz4	wa017	1998	1:12000
Zen-Horseflat complex, 3 to 8 percent slopes	494	858	699577	rgz0	wa017	1998	1:12000
Zen-Horseflat-Ralls complex, 8 to 15 percent slopes	497	793	699575	rgyy	wa017	1998	1:12000
Zen-Horseflat-Benwy complex, 3 to 8 percent slopes	496	567	699574	rgyx	wa017	1998	1:12000
Toler-Horseflat complex, 0 to 3 percent slopes	419	293	699568	rgyq	wa017	1998	1:12000
Zen-Horseflat-Ralls complex, 15 to 30 percent slopes	498	199	699576	rgyz	wa017	1998	1:12000
Zen-Horseflat complex, 8 to 15 percent slopes	495	191	699578	rgz1	wa017	1998	1:12000
Toler-Argabak-Horseflat complex, 0 to 20 percent slopes	415	81	700584	rj0h	wa017	1998	1:12000
Grinrod-Horseflat-Rubble land complex, 30 to 75 percent slopes	431	849	76872	2kzr	wa637	2008	1:24000
Grinrod-Horseflat complex, 15 to 30 percent slopes	429	285	76871	2kzq	wa637	2008	1:24000
Horseflat very cobbly loam, 3 to 15 percent slopes	465	273	76899	2l0m	wa637	2008	1:24000
Ralock-Horseflat complex, 30 to 65 percent slopes	476	254	76909	2l0y	wa637	2008	1:24000
Grinrod-Horseflat complex, 45 to 60 percent slopes	958	102	77346	2lh1	wa637	2008	1:24000
Stacker-Horseflat complex, 30 to 65 percent slopes	732	6409	76462	2kkj	wa639	2003	1:24000
Horseflat cobbly silt loam, 30 to 65 percent slopes	777	4549	76506	2kly	wa639	2003	1:24000
Stacker-Horseflat complex, 15 to 30 percent slopes	731	4155	76461	2kkh	wa639	2003	1:24000
Goodnoe-Swalecreek-Horseflat complex, 30 to 65 percent slopes	1032	4085	76137	2k71	wa639	2003	1:24000
Stacker-Horseflat complex, 2 to 15 percent slopes	730	1661	76460	2kkg	wa639	2003	1:24000
Stacker-Swalecreek-Horseflat complex, 15 to 30 percent slopes	1031	1488	76611	2kqb	wa639	2003	1:24000
Stacker-Swalecreek-Horseflat complex, 2 to 15 percent slopes	1030	911	76136	2k70	wa639	2003	1:24000
Tronsen-Goldendale-Horseflat complex, 15 to 30 percent slopes	1017	512	76130	2k6t	wa639	2003	1:24000
Horseflat cobbly silt loam, 15 to 30 percent slopes	776	290	76505	2klx	wa639	2003	1:24000
Tronsen-Goodnoe-Horseflat complex, 30 to 65 percent slopes	1018	282	76132	2k6w	wa639	2003	1:24000
Horseflat cobbly silt loam, 2 to 15 percent slopes	775	191	76503	2klv	wa639	2003	1:24000
Cheviot, extremely stony-Horseflat, very stony complex, 35 to 60 percent slopes	3717	4870	86722	2x7h	wa676	2014	1:12000
Horseflat very cobbly loam, 35 to 70 percent slopes, very stony	203	4390	86133	2wmh	wa676	2014	1:12000
Clerf-Horseflat, dry complex, 35 to 60 percent slopes, very stony	3812	2670	86716	2x79	wa676	2014	1:12000
Horseflat very cobbly loam, 12 to 35 percent slopes, very stony	202	2280	86111	2wls	wa676	2014	1:12000
Horseflat, very stony-Walla Walla complex, 35 to 70 percent slopes	206	2280	86131	2wmf	wa676	2014	1:12000
Cheviot, extremely stony-Horseflat, very stony complex, 12 to 35 percent slopes	3716	2130	86725	2x7l	wa676	2014	1:12000
Clerf-Horseflat, dry complex, 12 to 35 percent slopes, very stony	3811	2020	86717	2x7b	wa676	2014	1:12000
Clerf, very stony-Cheviot, extremely stony-Horseflat, very stony complex, 35 to 70 percent slopes	3804	1570	86720	2x7f	wa676	2014	1:12000
Horseflat, very stony-Walla Walla complex, 20 to 35 percent slopes	205	1190	86132	2wmg	wa676	2014	1:12000
Horseflat very cobbly loam, 0 to 12 percent slopes, very stony	201	580	86121	2wm3	wa676	2014	1:12000
Kiona, extremely stony-Horseflat, very stony-Tanawit complex, 35 to 60 percent slopes	2102	450	86643	2x4y	wa676	2014	1:12000
Argabak-Horseflat complex, 3 to 15 percent slopes	8	5913	70749	2cm7	wa681	1994	1:24000
Grinrod-Horseflat complex, 15 to 30 percent slopes	81	5519	71217	2d3b	wa681	1994	1:24000
Grinrod-Horseflat complex, 45 to 60 percent slopes	82	2796	71218	2d3c	wa681	1994	1:24000
Ralock-Horseflat complex, 15 to 30 percent slopes	128	2273	70794	2cnp	wa681	1994	1:24000
Norod-Horseflat complex, 15 to 30 percent slopes	111	2200	70777	2cn4	wa681	1994	1:24000
Norod-Horseflat complex, 45 to 60 percent slopes	113	1955	70779	2cn6	wa681	1994	1:24000
Horseflat very cobbly loam, 3 to 15 percent slopes	84	1792	71220	2d3f	wa681	1994	1:24000
Norod-Ralock-Horseflat complex, 30 to 45 percent slopes	115	1750	70781	2cn8	wa681	1994	1:24000
Norod-Ralock-Horseflat complex, 45 to 60 percent slopes	116	1691	70782	2cn9	wa681	1994	1:24000
Norod-Ralock-Horseflat complex, 15 to 30 percent slopes	114	1096	70780	2cn7	wa681	1994	1:24000
Argabak-Horseflat complex, 15 to 30 percent slopes	9	1069	70750	2cm8	wa681	1994	1:24000
Caliralls-Horseflat complex, 15 to 30 percent slopes	34	651	70882	2crj	wa681	1994	1:24000
Horseflat very cobbly loam, 15 to 30 percent slopes	85	448	71221	2d3g	wa681	1994	1:24000
Norod-Horseflat complex, 30 to 45 percent slopes	112	395	70778	2cn5	wa681	1994	1:24000

Map of Series Extent

Approximate geographic distribution of the HORSEFLAT 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).