Soil Data Explorer - FORTLEWIS

Official Series Description

Lab Data Summary

Aggregate lab data for the FORTLEWIS soil series. This aggregation is based on all pedons with a current taxon name of FORTLEWIS, 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 FORTLEWIS 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 FORTLEWIS 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 FORTLEWIS series. Sketches are arranged according to their subgroup-level taxonomic structure. Source: SSURGO snapshot (updated 2024-10-24), parsed OSD records (updated 2024-10-23) and snapshot of SC database (updated 2024-10-23).

Select annual climate data summaries for the FORTLEWIS 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 FORTLEWIS 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).

Competing Series

Soil series competing with FORTLEWIS share the same family level classification in Soil Taxonomy. Source: parsed OSD records (updated 2024-10-23) and snapshot of the SC database (updated 2024-10-23).

Select annual climate data summaries for the FORTLEWIS 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 FORTLEWIS 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 3D terrace figure.

Soil series sharing subgroup-level classification with FORTLEWIS, 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 2024-10-23).

Block Diagrams

No block diagrams are available.

Map Units

Map units containing FORTLEWIS 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
Fortlewis fine sandy loam, 5 to 25 percent slopes	M2-CD	7260	499280	jrjt	co668	2018	1:24000
Fortlewis stony fine sandy loam, 3 to 12 percent slopes	616	4778	507217	k0sv	co672	2003	1:24000
Fortlewis-Rock outcrop complex, 6 to 25 percent slopes	930	826	507297	k0wf	co672	2003	1:24000
Elbuck-Fortlewis families complex, warm, 0 to 15 percent slopes	162	28107	2770063	2sdm1	nm672		1:24000
Elbuck family, warm, Fortlewis family, warm, and Lithic Ustorthents, frigid, dry soils, 0 to 40 percent slopes	721	20787	2770122	2sw5z	nm672		1:24000
Elbuck-Fortlewis families gravelly loams, warm, 0 to 15 percent slopes	190	10278	2770080	2sdml	nm672		1:24000
Fortlewis family, deep-Trampas family complex, 15 to 40 percent slopes	452	8719	2770100	2sw58	nm672		1:24000
Elbuck-Fortlewis families complex, deep, dry, eroded, 0 to 15 percent slopes	148	4489	2770055	2sdls	nm672		1:24000
Fortlewis family, deep-Trampas family complex, 0 to 15 percent slopes	211	4281	2770088	2sdmv	nm672		1:24000
Fortlewis family loam, deep, warm, 0 to 15 percent slopes	290	2412	2770090	2sdmx	nm672		1:24000
Fortlewis family, stony-Rock outcrop complex, 5 to 25 percent slopes	240BK		708658	rsdy	wy622		1:24000

Map of Series Extent

Approximate geographic distribution of the FORTLEWIS 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).