Soil Data Explorer - OCTAGON

Official Series Description

Lab Data Summary

Aggregate lab data for the OCTAGON soil series. This aggregation is based on all pedons with a current taxon name of OCTAGON, 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 OCTAGON 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
108A	40A2807	67IL089003a	Octagon	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	41.7852924,-88.3939311
110	NW8314	1983IN111014	Octagon	3	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	40.7442028,-87.4843972
110	85IL105011	1985IL105011	Octagon	2	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	40.8122139,-88.8563667
111C	WH7628	1976IN181028	Octagon	3	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	40.6477778,-86.8660194
111C	WH7703	1977IN181003	Octagon	3	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	40.6647194,-87.0824056
111C	JR7920	1979IN073020	Octagon	3	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	40.9781333,-87.1465444
111C	JR7921	1979IN073021	Octagon	2	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	40.9800528,-87.1401139
111D	MY8004	1980IN107004	Octagon	3	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	40.1850611,-86.9256833
111D	TI8420	1984IN157020	Octagon	3	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	40.3465778,-86.8347778
111D	82P0844	S1982IN107007	Octagon	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	40.1845856,-86.9260178
111D	82P0845	S1982IN107008	Octagon	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	40.1845856,-86.9260178

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the OCTAGON 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 OCTAGON series. Sketches are arranged according to their subgroup-level taxonomic structure. Source: SSURGO snapshot (updated 2024-02-21), parsed OSD records (updated 2023-10-06) and snapshot of SC database (updated 2023-10-02).

Select annual climate data summaries for the OCTAGON 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 OCTAGON 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.

Competing Series

Soil series competing with OCTAGON share the same family level classification in Soil Taxonomy. Source: parsed OSD records (updated 2023-10-06) and snapshot of the SC database (updated 2023-10-02).

Select annual climate data summaries for the OCTAGON 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 OCTAGON 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 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 OCTAGON, 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 OCTAGON 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
Octagon silt loam, 4 to 6 percent slopes, eroded	656C2	3741	183933	65db	il037	1998	1:12000
Octagon silt loam, 2 to 4 percent slopes	656B	2592	183932	65d9	il037	1998	1:12000
Octagon silt loam, 5 to 10 percent slopes, eroded	656C2	996	1019432	136sx	il041	2004	1:12000
Octagon silt loam, 2 to 4 percent slopes	656B	6906	198860	6nxv	il089	2000	1:12000
Octagon silt loam, 4 to 6 percent slopes, eroded	656C2	6221	198861	6nxw	il089	2000	1:12000
Octagon silt loam, 6 to 12 percent slopes, eroded	656D2	2006	198862	6nxx	il089	2000	1:12000
Octagon silt loam, 2 to 4 percent slopes	656B	1422	182769	645s	il111	1997	1:12000
Octagon silt loam, 4 to 6 percent slopes, eroded	656C2	743	182770	645t	il111	1997	1:12000
Octagon silt loam, 6 to 12 percent slopes, eroded	656D2	584	1592062	1qfnv	il177	2006	1:12000
Octagon silt loam, 4 to 6 percent slopes, eroded	656C2	447	1592061	1qfnt	il177	2006	1:12000
Octagon silt loam, 2 to 6 percent slopes, eroded	ObmB2	1183	242426	8486	in045	1999	1:12000
Octagon silt loam, 6 to 12 percent slopes, eroded	ObmC2	759	242425	8485	in045	1999	1:12000
Octagon fine sandy loam, 6 to 12 percent slopes, eroded	OcC2	618	161374	5dxm	in073	1985	1:15840
Octagon loam, 2 to 6 percent slopes	OnB	954	163044	5gnh	in107	1984	1:15840
Octagon loam, 6 to 12 percent slopes	OnC	355	163045	5gnj	in107	1984	1:15840
Octagon-Ayr complex, 2 to 6 percent slopes, eroded	OkB2	4242	163693	5hbf	in111	1990	1:15840
Octagon loam, 6 to 12 percent slopes, eroded	OcC2	552	163689	5hb9	in111	1990	1:15840
Octagon silt loam, 2 to 6 percent slopes, eroded	OmB2	3573	164201	5hvt	in157	1990	1:15840
Toronto-Octagon complex, 2 to 6 percent slopes, eroded	TnB2	2296	164331	5j00	in157	1990	1:15840
Octagon silt loam, 6 to 12 percent slopes, eroded	OmC2	1051	164203	5hvw	in157	1990	1:15840
Octagon clay loam, 6 to 12 percent slopes, severely eroded	OpC3	466	164210	5hw3	in157	1990	1:15840
Octagon silt loam, 2 to 6 percent slopes	OcB	839	161859	5ff8	in181	1979	1:20000
Octagon silt loam, 6 to 12 percent slopes, eroded	OcC2	147	161860	5ff9	in181	1979	1:20000

Map of Series Extent

Approximate geographic distribution of the OCTAGON 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).