Soil Data Explorer - FROBERG

Official Series Description

Lab Data Summary

Aggregate lab data for the FROBERG soil series. This aggregation is based on all pedons with a current taxon name of FROBERG, 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 FROBERG 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
92	02N0711	S2001MI131009	Froberg	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	46.5613861,-89.1550751
92	03N0267	S2002MI131005	Froberg	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	46.5892563,-89.1795502

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the FROBERG 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 FROBERG 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 FROBERG 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 FROBERG 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 FROBERG 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 FROBERG 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).

There are insufficient data to create the annual climate figure.

Geomorphic description summaries for the FROBERG 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 2D hillslope position figure.

There are insufficient data to create the 3D hills figure.

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 FROBERG, 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. MI-2012-02-06-18 | Houghton County Area - October 1991

   Diagrammatic cross section of Houghton County showing the topography, elevation, general soil texture, landforms, and dominant soils and their drainage class (Soil Survey of Houghton County Area, Michigan; October 1991).

Map Units

Map units containing FROBERG 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
Froberg silt loam, 1 to 6 percent slopes	38B	1811	414978	fxtd	mi013	1984	1:20000
Froberg clay, 1 to 6 percent slopes	226B	500	1456378	1kwgy	mi053	2007	1:24000
Payseor-Froberg complex, 0 to 4 percent slopes	219B	312	1456375	1kwgv	mi053	2007	1:24000
Froberg-Rudyard silt loams, 1 to 8 percent slopes	73B	3420	416157	fz1f	mi061	1989	1:20000
Payseor-Froberg complex, 0 to 4 percent slopes	8219B	731	2484894	2pdqw	mi061	1989	1:20000
Froberg clay, 1 to 6 percent slopes	8226B	188	2484999	2pdv8	mi061	1989	1:20000
Froberg-Cuttre complex, 1 to 6 percent slopes	8035B	46	2566034	1kwj4	mi061	1989	1:20000
Froberg clay, 1 to 6 percent slopes	34B	6431	1456413	1kwj2	mi131	2007	1:24000
Payseor-Froberg complex, 0 to 4 percent slopes	8219B	4576	1674866	1t6ty	mi131	2007	1:24000
Froberg-Cuttre complex, 1 to 6 percent slopes	35B	3502	1456415	1kwj4	mi131	2007	1:24000
Froberg clay, 6 to 18 percent slopes	34D	973	1456414	1kwj3	mi131	2007	1:24000

Map of Series Extent

Approximate geographic distribution of the FROBERG 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).