Soil Data Explorer - BOLD

Official Series Description

Lab Data Summary

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

Competing Series

Soil series competing with BOLD 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 BOLD 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 BOLD 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 BOLD, 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. IL-2011-08-03-04 | Cass County - 1989

   Typical pattern of soils and parent material in the Sylvan-Rozetta-Bold general soil map unit (Soil Survey of Cass County, Illinois; 1989).

2. IL-2011-08-03-06 | Cass County - 1989

   Typical pattern of soils and parent material in the Ipava-Tama general soil map unit (Soil Survey of Cass County, Illinois; 1989).

3. MN-2010-09-08-15 | Meeker County - 1999

   Typical pattern of soils and parent material in the Madelia-Truman-Kingston association (Soil Survey of Meeker County, Minnesota; 1999).

Map Units

Map units containing BOLD 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
Sylvan-Bold complex, 10 to 18 percent slopes, severely eroded	962D3	8540	262827	8th9	il017	2003	1:12000
Sylvan-Bold silt loams, 18 to 25 percent slopes, eroded	962E2	6839	262828	8thb	il017	2003	1:12000
Tallula-Bold silt loams, 10 to 18 percent slopes, eroded	965D2	4875	262830	8thd	il017	2003	1:12000
Sylvan-Bold Complex, 5 to 10 percent slopes, severely eroded	962C3	4006	262826	8th8	il017	2003	1:12000
Sylvan-Bold silt loams, 10 to 18 percent slopes, eroded	962D2	2546	780783	v6gk	il017	2003	1:12000
Sylvan-Bold silt loams, 18 to 35 percent slopes	962F	577	758469	tg7r	il017	2003	1:12000
Tallula-Bold silt loams, 18 to 35 percent slopes	965F	526	262831	8thf	il017	2003	1:12000
Alford-Bold complex, 7 to 12 percent slopes, eroded	985D2	158	211712	739f	il059	1966	1:20000
Sylvan-Bold silt loams, 35 to 60 percent slopes	962G	4669	211793	73d1	il061	1968	1:15840
Sylvan-Bold silt loams, 18 to 25 percent slopes, eroded	962E2	1495	211792	73d0	il061	1968	1:15840
Sylvan-Bold silt loams, 18 to 35 percent slopes	962F	1171	211791	73cz	il061	1968	1:15840
Sylvan-Bold silt loams, 10 to 18 percent slopes, eroded	962D2	1051	211790	73cy	il061	1968	1:15840
Sylvan-Bold complex, 10 to 18 percent slopes, severely eroded	962D3	3084	244783	86q7	il073	2001	1:12000
Sylvan-Bold silt loams, 35 to 60 percent slopes	962G	3651	728443	sg05	il083	2002	1:12000
Sylvan-Bold silt loams, 18 to 35 percent slopes	962F	1916	728442	sg04	il083	2002	1:12000
Sylvan-Bold silt loams, 18 to 25 percent slopes, eroded	962E2	1605	728445	sg07	il083	2002	1:12000
Sylvan-Bold silt loams, 10 to 18 percent slopes, eroded	962D2	914	728439	sg01	il083	2002	1:12000
Sylvan-Bold complex, 10 to 18 percent slopes, severely eroded	962D3	217	728441	sg03	il083	2002	1:12000
Sylvan-Bold complex, terrace, 10 to 18 percent slopes, severely eroded	9962D3	147	728475	sg16	il083	2002	1:12000
Tallula-Bold silt loams, 10 to 18 percent slopes, eroded	965D2	587	1596061	1qktv	il107	2006	1:12000
Tallula-Bold silt loams, 5 to 10 percent slopes, eroded	965C2	132	1596060	1qktt	il107	2006	1:12000
Sylvan-Bold silt loams, 18 to 35 percent slopes, eroded	962F2	4130	198923	6nzw	il119	2001	1:12000
Sylvan-Bold silt loams, 10 to 18 percent slopes, eroded	962D2	1955	198922	6nzv	il119	2001	1:12000
Bold silt loam, 18 to 35 percent slopes	35F	391	198941	6p0g	il119	2001	1:12000
Tallula-Bold silt loams, 10 to 18 percent slopes, eroded	965D2	986	177829	5z1f	il125	1989	1:15840
Tallula-Bold silt loams, 5 to 10 percent slopes, eroded	965C2	4310	1406149	1j66n	il129	2005	1:12000
Sylvan-Bold silt loams, 10 to 18 percent slopes, eroded	962D2	3928	1406116	1j65l	il129	2005	1:12000
Sylvan-Bold silt loams, 5 to 10 percent slopes, eroded	962C2	3071	1486967	1lx9p	il129	2005	1:12000
Sylvan-Bold silt loams, 18 to 35 percent slopes, eroded	962F2	2859	1486744	1lx2h	il129	2005	1:12000
Sylvan-Bold complex, 5 to 10 percent slopes, severely eroded	962C3	2771	1406054	1j63l	il129	2005	1:12000
Sylvan-Bold complex, 10 to 18 percent slopes, severely eroded	962D3	1610	1406123	1j65t	il129	2005	1:12000
Sylvan-Bold silt loams, 35 to 60 percent slopes	962G	395	1406044	1j638	il129	2005	1:12000
Sylvan-Bold silt loams, 18 to 25 percent slopes, eroded	962E2	296	1488479	1lywg	il129	2005	1:12000
Tallula-Bold silt loams, 10 to 18 percent slopes, eroded	965D2	268	1406150	1j66p	il129	2005	1:12000
Sylvan-Bold complex, 10 to 18 percent slopes, severely eroded	962D3	3350	245019	86yv	il131	2000	1:12000
Sylvan-Bold complex, 18 to 25 percent slopes, severely eroded	962E3	3012	1672188	1t41k	il137	1984	1:15840
Sylvan-Bold silt loams, 18 to 25 percent slopes, eroded	962E2	2014	1672187	1t41j	il137	1984	1:15840
Sylvan-Bold complex, 10 to 18 percent slopes, severely eroded	962D3	1062	1672186	1t41h	il137	1984	1:15840
Sylvan-Bold silt loams, 10 to 18 percent slopes, eroded	962D2	73	2542163	2qvjq	il137	1984	1:15840
Sylvan-Bold complex, 5 to 10 percent slopes, severely eroded	962C3	51	2542162	2qvjp	il137	1984	1:15840
Sylvan-Bold silt loams, 18 to 35 percent slopes	962F	1312	198764	6ntr	il161	2002	1:12000
Sylvan-Bold silt loams, 18 to 35 percent slopes, eroded	962F2	4825	183198	64mm	il163	1997	1:12000
Sylvan-Bold silt loams, 35 to 60 percent slopes	962G	1941	183200	64mp	il163	1997	1:12000
Sylvan-Bold silt loams, 18 to 25 percent slopes, eroded	962E2	3395	2542083	2qrcm	il171	1984	1:12000
Sylvan-Bold complex, 18 to 25 percent slopes, severely eroded	962E3	1243	2542084	2qrcn	il171	1984	1:12000
Sylvan-Bold complex, 10 to 18 percent slopes, severely eroded	962D3	800	2542082	2qrcl	il171	1984	1:12000
Sylvan-Bold silt loams, 10 to 18 percent slopes, eroded	962D2	9	2542081	2qrck	il171	1984	1:12000
Bold-Truman silt loams, 12 to 18 percent slopes	909D	286	396212	f991	mn013	1975	1:12000
Bold-Truman silt loams, 6 to 12 percent slopes	909C	256	396211	f990	mn013	1975	1:12000
Timula-Bold silt loams, 12 to 18 percent slopes, eroded	963D2	832	396910	fb0k	mn037	1980	1:15840
Timula-Bold silt loams, 6 to 12 percent slopes, eroded	963C2	821	396909	fb0j	mn037	1980	1:15840
Timula-Bold silt loams, 18 to 25 percent slopes, eroded	963E2	606	396911	fb0l	mn037	1980	1:15840
Truman-Bold complex, 6 to 12 percent slopes, eroded	909C2	2580	397124	fb7g	mn043	1989	1:20000
Bold-Truman complex, 12 to 18 percent slopes, eroded	909D2	517	397125	fb7h	mn043	1989	1:20000
Truman-Bold silt loams, 6 to 12 percent slopes	909C	685	400064	ff99	mn091	1985	1:20000
Bold-Truman silt loams, 12 to 18 percent slopes, eroded	909D2	137	400065	ff9b	mn091	1985	1:20000
Bold-Truman complex, 6 to 12 percent slopes, eroded	909C2	928	436461	gn5d	mn093	1996	1:20000
Gardencity-Bold complex, 6 to 12 percent slopes, eroded	1177C	465	436203	gmx2	mn093	1996	1:20000
Bold-Truman complex, 12 to 18 percent slopes, eroded	909D2	295	436462	gn5f	mn093	1996	1:20000
Timula-Bold complex, 6 to 12 percent slopes, eroded	963C2	1191	429744	gf5q	mn131	1996	1:12000
Timula-Bold complex, 12 to 18 percent slopes, eroded	963D2	200	429746	gf5s	mn131	1996	1:12000
Seaton-Bold soils, 12 to 18 percent slopes, moderately eroded	SbD2	31	2216431	2ddcs	mn157	2008	1:12000
Bold-Truman silt loams, 5 to 12 percent slopes, eroded	909C2	626	428968	gdcp	mn165	1987	1:20000

Map of Series Extent

Approximate geographic distribution of the BOLD 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).