Soil Data Explorer - FERGUS

Official Series Description

Lab Data Summary

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

Competing Series

Soil series competing with FERGUS 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 FERGUS 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 FERGUS 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).

Soil series sharing subgroup-level classification with FERGUS, 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 FERGUS 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
Wrayha-Dollard-Fergus complex, 25 to 65 percent slopes, very stony	MC34	985	3170464	k093	co676	1983	1:24000
Fergus, very stony-Zoltay complex, 3 to 12 percent slopes	MC33	132	3170480	k092	co676	1983	1:24000
Wrayha-Dollard-Fergus complex, 25 to 65 percent slopes, very stony	34	7770	506729	k093	co680	1970	1:31680
Fergus, very stony-Zoltay complex, 3 to 12 percent slopes	33	2700	506728	k092	co680	1970	1:31680
Wrayha-Dollard-Fergus complex, 25 to 65 percent slopes, very stony	MC34	65	3170517	k093	co682	1986	1:24000
Fergus clay loam, 2 to 8 percent slopes	101	4154	342326	ch6s	mt027	1979	1:24000
Fergus clay loam, 0 to 2 percent slopes	100	1859	342325	ch6r	mt027	1979	1:24000
Fergus clay loam, 2 to 8 percent slopes	254C	593	344527	ckhs	mt065	1996	1:24000
Fergus silty clay loam, shale substratum, 2 to 8 percent slopes	Fs	16219	147358	4ybh	mt602	1963	1:20000
Fergus clay loam, 2 to 4 percent slopes	Fd	1836	147355	4ybd	mt602	1963	1:20000
Fergus clay loam, 0 to 2 percent slopes	Fc	1089	147354	4ybc	mt602	1963	1:20000
Fergus clay loam, 4 to 8 percent slopes	Ff	251	147356	4ybf	mt602	1963	1:20000
Fergus clay loam, 8 to 15 percent slopes	Fh	49	147357	4ybg	mt602	1963	1:20000
Peritsa complex, rolling	PF	3553	346095	cm4c	mt607	1970	1:24000
Fergus silt loam, 4 to 8 percent slopes	Ff	1813	345946	clzk	mt607	1970	1:24000
Fergus silt loam, 2 to 4 percent slopes	Fe	1443	345945	clzj	mt607	1970	1:24000
Fergus silt loam, 8 to 15 percent slopes	Fg	950	345947	clzl	mt607	1970	1:24000
Fergus silty clay loam, 0 to 2 percent slopes	80	3515	341968	cgv7	mt613	1975	1:24000
Fergus clay loam, 2 to 4 percent slopes	78	2346	341965	cgv4	mt613	1975	1:24000
Fergus-Absher silty clay loams, 0 to 2 percent slopes	81	1326	341969	cgv8	mt613	1975	1:24000
Fergus clay loam, 4 to 8 percent slopes	79	1213	341966	cgv5	mt613	1975	1:24000
Roy-Fergus complex, 15 to 35 percent slopes	746E	4993	144563	4vfb	mt621	1997	1:24000
Roy-Fergus complex, 8 to 15 percent slopes	746D	2032	144562	4vf9	mt621	1997	1:24000
Fergus loam, 8 to 15 percent slopes	140D	651	144208	4v1w	mt621	1997	1:24000
Roy-Fergus complex, 4 to 8 percent slopes	746C	633	144561	4vf8	mt621	1997	1:24000
Fergus loam, 15 to 35 percent slopes	140E	627	144209	4v1x	mt621	1997	1:24000
Roy-Fergus complex, 35 to 60 percent slopes	746F	447	144564	4vfc	mt621	1997	1:24000
Fergus loam, 4 to 8 percent slopes	140C	411	144207	4v1v	mt621	1997	1:24000
Fergus loam, 2 to 4 percent slopes	140B	364	144206	4v1t	mt621	1997	1:24000
Fergus clay loam, 2 to 15 percent slopes	707D	184	2487415	2phc6	mt624	2021	1:24000
Roy-Fergus complex, 15 to 35 percent slopes	746E	67	1703006	1v53p	mt635	2006	1:24000
Fergus-Relan association, 2 to 8 percent slopes	Fn	6549	347853	cnz2	mt643	1967	1:20000
Fergus-Water complex, 2 to 8 percent slopes	40C	2724	145726	4wmv	mt644	1995	1:24000
Fergus variant-Twin Creek complex, 2 to 8 percent slopes	80	1322	348115	cp7j	mt649	1985	1:24000
Fergus clay loam, 2 to 8 percent slopes	254C	45	1531658	1ndtb	mt666	2008	1:24000
Fergus, very stony-Zoltay complex, 3 to 12 percent slopes	MC33	14	3202650	k092	ut633	1983	1:24000

Map of Series Extent

Approximate geographic distribution of the FERGUS 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).