Soil Data Explorer - KNOWLES

Official Series Description

Lab Data Summary

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

Soil series sharing subgroup-level classification with KNOWLES, 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 KNOWLES 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
Knowles silt loam, 2 to 6 percent slopes	KnB	1308	423288	2wsry	wi021	1972	1:15840
Knowles silt loam, 6 to 12 percent slopes, eroded	KnC2	1124	423289	2wss0	wi021	1972	1:15840
Knowles silt loam, 12 to 20 percent slopes, eroded	KnD2	331	423290	2wss1	wi021	1972	1:15840
Knowles silt loam, 2 to 6 percent slopes	KwB	3015	423594	2wsry	wi027	1976	1:15840
Knowles silt loam, 0 to 2 percent slopes	KwA	1645	423593	2wsrx	wi027	1976	1:15840
Knowles silt loam, 6 to 12 percent slopes, eroded	KwC2	763	423595	2wss0	wi027	1976	1:15840
Knowles variant silt loam, 0 to 2 percent slopes	KxA	344	423596	g6sd	wi027	1976	1:15840
Knowles variant silt loam, 2 to 6 percent slopes	KxB	332	423597	g6sf	wi027	1976	1:15840
Lomira-Knowles silt loams, 2 to 6 percent slopes	LwB	847	425502	2wss3	wi039	1967	1:15840
Knowles silt loam, 2 to 6 percent slopes	KwB	781	425480	2wsry	wi039	1967	1:15840
Knowles silt loam, 0 to 2 percent slopes	KwA	448	425479	2wsrx	wi039	1967	1:15840
Lomira-Knowles silt loams, 2 to 6 percent slopes, eroded	LwB2	420	425503	2wss4	wi039	1967	1:15840
Knowles silt loam, 6 to 12 percent slopes, eroded	KwC2	243	425481	2wss0	wi039	1967	1:15840
Lomira-Knowles silt loams, 0 to 2 percent slopes	LwA	205	425501	2wss2	wi039	1967	1:15840
Knowles silt loam, 12 to 20 percent slopes, eroded	KwE2	120	425482	2wss1	wi039	1967	1:15840
Lomira-Knowles silt loams, 6 to 12 percent slopes, eroded	LwC2	120	425504	2wss5	wi039	1967	1:15840
Knowles silt loam, 2 to 6 percent slopes	KwB	1784	423703	2wsry	wi047	1974	1:20000
Knowles silt loam, 6 to 12 percent slopes, eroded	KwC2	674	423704	2wss0	wi047	1974	1:20000
Knowles silt loam, 12 to 20 percent slopes, eroded	KwD2	456	423705	2wss1	wi047	1974	1:20000
Knowles silt loam, 0 to 2 percent slopes	KwA	344	423702	2wsrx	wi047	1974	1:20000
Knowles silt loam, 2 to 6 percent slopes	KwB	105	3403347	2wsry	wi079	2023	1:15840
Knowles silt loam, 0 to 2 percent slopes	KwA	16	3403348	2wsrx	wi079	2023	1:15840
Knowles silt loam, 2 to 6 percent slopes, eroded	KwB2	372	425986	2wsrz	wi089	1967	1:15840
Knowles silt loam, 0 to 2 percent slopes	KwA	256	425985	2wsrx	wi089	1967	1:15840
Knowles silt loam, mottled subsoil variant, 0 to 2 percent slopes	KyA	238	425987	g98j	wi089	1967	1:15840
Knowles silt loam, 2 to 6 percent slopes	KmB	126	3268792	2wsry	wi101	2023	1:15840
Hochheim-Knowles silt loams, 1 to 6 percent slopes	HtB	418	423893	2xzl2	wi117	1974	1:15840
Knowles silt loam, mottled subsoil variant, 0 to 2 percent slopes	KyA	268	425634	g8x4	wi127	1967	1:15840
Knowles silt loam, 2 to 6 percent slopes	KwB	174	425633	2wsry	wi127	1967	1:15840
Knowles silt loam, 2 to 6 percent slopes	KwB	1150	425744	2wsry	wi131	1967	1:15840
Knowles silt loam, 6 to 12 percent slopes, eroded	KwC2	110	425745	2wss0	wi131	1967	1:15840
Knowles silt loam, 2 to 6 percent slopes	KwB	1681	3403415	2wsry	wi133	2023	1:15840
Knowles silt loam, 0 to 2 percent slopes	KwA	697	3403416	2wsrx	wi133	2023	1:15840
Knowles silt loam, 2 to 6 percent slopes	KwB	878	422795	2wsry	wi139	1977	1:20000
Knowles silt loam, 6 to 12 percent slopes, eroded	KwC2	263	422796	2wss0	wi139	1977	1:20000

Map of Series Extent

Approximate geographic distribution of the KNOWLES 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).