Soil Data Explorer - SAC

Official Series Description

Lab Data Summary

Aggregate lab data for the SAC soil series. This aggregation is based on all pedons with a current taxon name of SAC, 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 SAC were used in the calculation. Source: KSSL snapshot (updated 2020-03-13). 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
107A	40A1454	1959IA041005	Sac	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.0447222,-95.3288889
107A	84P0770	84IA035001	Sac	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	42.7091675,-95.430275
107A	84P0772	84IA035003	Sac	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	42.8888893,-95.4833298
107A	85P0505	84IA1410011	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.1444435,-95.5916672
107A	85P0506	84IA1410012	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.1444435,-95.5916672
107A	85P0507	84IA1410021	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.0250015,-95.5138855
107A	85P0508	84IA1410022	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.0250015,-95.5138855
107A	85P0509	84IA1410023	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.0250015,-95.5138855
107A	85P0293	85IA0350021	Sac	4	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	42.8916664,-95.7249985
107A	85P0294	85IA0350022	Sac	4	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	42.8916664,-95.7249985
107A	85P0295	85IA0350023	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	42.8916664,-95.7249985
107A	86P0339	85IA0350031	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	42.9000015,-95.5500031
107A	86P0340	85IA0350032	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	42.9000015,-95.5500031
107A	86P0341	85IA0350033	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	42.9000015,-95.5500031
107A	86P0420	85IA1410031	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.0499992,-95.4833298
107A	86P0422	85IA1410033	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.0499992,-95.4833298
107A	86P0423	85IA1410041	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.1472206,-95.6166687
107A	86P0424	85IA1410042	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.1472206,-95.6166687
107A	87P0332	86IA0350041	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	42.8844452,-95.6022186
107A	86P0421	86IA1410032	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.0499992,-95.4833298
107A	87P0359	87IA1410051	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	42.9141655,-95.4455566
107A	87P0360	87IA1410052	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	42.914444,-95.4461136
107A	87P0361	87IA1410053	Sac	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	42.9150009,-95.4455566
107A	40A1455	S1959IA041006	Sac	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.0149994,-95.2291641
107A	96P0060	S1995IA041005	Sac	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	43.0441666,-95.3291702

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the SAC 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 SAC 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 SAC 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 SAC 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 SAC 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 SAC 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 SAC 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 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 SAC, 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. IA-2010-09-02-06 | Clay County - 2005

   Typical pattern of soils and underlying material in the McCreath-Gillett Grove-Sac association (Soil Survey of Clay County, Iowa; 2005).

2. IA-2011-06-01-27 | Osceola County - 1988

   Typical pattern of soils and parent material in the Sac-Primghar association (Soil Survey of Osceola County, Iowa; 1988).

Map Units

Map units containing SAC 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
Sac silty clay loam, loam substratum, 2 to 5 percent slopes	77B	25199	403327	2wxrd	ia021	1973	1:15840
Sac silty clay loam, 2 to 5 percent slopes	78B	3937	403329	2wxrc	ia021	1973	1:15840
Sac silty clay loam, loam substratum, 5 to 9 percent slopes, eroded	77C2	3627	403328	2wxrl	ia021	1973	1:15840
Sac silty clay loam, 5 to 9 percent slopes, eroded	78C2	1806	403330	2wxrk	ia021	1973	1:15840
Sac silty clay loam, loam substratum, 2 to 5 percent slopes, eroded	77B2	2918	403956	2wxrg	ia035	1987	1:15840
Sac silty clay loam, loam substratum, 2 to 5 percent slopes	77B	2476	403955	2wxrd	ia035	1987	1:15840
Sac silty clay loam, 2 to 5 percent slopes, eroded	78B2	2210	403960	2wxrf	ia035	1987	1:15840
Sac silty clay loam, 5 to 9 percent slopes, eroded	78C2	2170	403962	2wxrk	ia035	1987	1:15840
Sac silty clay loam, loam substratum, 5 to 9 percent slopes, eroded	77C2	1683	403958	2wxrl	ia035	1987	1:15840
Sac silty clay loam, 2 to 5 percent slopes	78B	1418	403959	2wxrc	ia035	1987	1:15840
Sac silty clay loam, 5 to 9 percent slopes	78C	379	403961	2wxrh	ia035	1987	1:15840
Sac silty clay loam, loam substratum, 5 to 9 percent slopes	77C	376	403957	2wxrj	ia035	1987	1:15840
Sac silty clay loam, loam substratum, 2 to 5 percent slopes	77B	14180	399421	2wxrd	ia041	2002	1:12000
Sac silty clay loam, loam substratum, 5 to 9 percent slopes, eroded	77C2	984	399423	2wxrl	ia041	2002	1:12000
Sac silty clay loam, loam substratum, 5 to 9 percent slopes	77C	497	399422	2wxrj	ia041	2002	1:12000
Sac silty clay loam, loam substratum, 2 to 5 percent slopes	77B	2886	1869033	2wxrd	ia059	2011	1:12000
Sac silty clay loam, 5 to 9 percent slopes, eroded	78C2	2044	407203	2wxrk	ia093	1989	1:15840
Sac silty clay loam, 2 to 5 percent slopes, eroded	78B2	746	407201	2wxrf	ia093	1989	1:15840
Sac silty clay loam, 9 to 14 percent slopes, eroded	78D2	589	407206	2wxrm	ia093	1989	1:15840
Sac silty clay loam, 5 to 9 percent slopes	78C	394	407202	2wxrh	ia093	1989	1:15840
Sac silty clay loam, 2 to 5 percent slopes	78B	157	407200	2wxrc	ia093	1989	1:15840
Sac silty clay loam, loam substratum, 2 to 5 percent slopes	77B	10221	409139	2wxrd	ia119	1973	1:15840
Sac silty clay loam, loam substratum, 2 to 5 percent slopes, eroded	77B2	2502	409140	2wxrg	ia119	1973	1:15840
Sac silty clay loam, loam substratum, 5 to 9 percent slopes, eroded	77C2	1681	409141	2wxrl	ia119	1973	1:15840
Sac silty clay loam, loam substratum, 9 to 14 percent slopes, eroded	77D2	140	409142	2wxrn	ia119	1973	1:15840
Sac silty clay loam, loam substratum, 2 to 5 percent slopes	77B	40840	410096	2wxrd	ia141	1977	1:15840
Sac silty clay loam, loam substratum, 5 to 9 percent slopes, eroded	77C2	3620	410097	2wxrl	ia141	1977	1:15840
Sac variant silty clay loam, 2 to 5 percent slopes	89B	744	410100	frr1	ia141	1977	1:15840
Sac variant silty clay loam, 5 to 9 percent slopes, moderately eroded	89C2	227	410101	frr2	ia141	1977	1:15840
Sac silty clay loam, loam substratum, 2 to 5 percent slopes	77B	15939	410174	2wxrd	ia143	1985	1:15840
Sac silty clay loam, loam substratum, 0 to 2 percent slopes	77	4166	410173	2wxrb	ia143	1985	1:15840
Sac silty clay loam, loam substratum, 2 to 5 percent slopes, eroded	77B2	2314	410175	2wxrg	ia143	1985	1:15840
Sac silty clay loam, loam substratum, 5 to 9 percent slopes, eroded	77C2	210	410176	2wxrl	ia143	1985	1:15840
Sac silty clay loam, 5 to 9 percent slopes, eroded	78C2	4416	410837	2wxrk	ia161	1975	1:15840
Sac silty clay loam, loam substratum, 2 to 5 percent slopes	77B	4350	410830	2wxrd	ia161	1975	1:15840
Sac silty clay loam, 2 to 5 percent slopes	78B	3629	410834	2wxrc	ia161	1975	1:15840
Sac silty clay loam, loam substratum, 5 to 9 percent slopes, eroded	77C2	3305	410833	2wxrl	ia161	1975	1:15840
Sac silty clay loam, 2 to 5 percent slopes, eroded	78B2	867	410835	2wxrf	ia161	1975	1:15840
Sac silty clay loam, 5 to 9 percent slopes	78C	634	410836	2wxrh	ia161	1975	1:15840
Sac silty clay loam, loam substratum, 5 to 9 percent slopes	77C	454	410832	2wxrj	ia161	1975	1:15840
Sac silty clay loam, loam substratum, 2 to 5 percent slopes, eroded	77B2	256	410831	2wxrg	ia161	1975	1:15840
Sac silty clay loam, 5 to 9 percent slopes, eroded	78C2	1610	411254	2wxrk	ia167	1987	1:15840
Sac silty clay loam, 2 to 5 percent slopes, eroded	78B2	839	411253	2wxrf	ia167	1987	1:15840
Sac silty clay loam, 9 to 14 percent slopes, eroded	78D2	419	411255	2wxrm	ia167	1987	1:15840
Sac silty clay loam, loam substratum, 2 to 5 percent slopes	P30B	20	1532196	2wxrd	mn101	2008	1:12000
Sac silty clay loam, loam substratum, 2 to 5 percent slopes	P30B	20716	630057	2wxrd	mn105	2004	1:12000
Sac silty clay loam, loam substratum, 2 to 5 percent slopes	P30B	1142	725517	2wxrd	mn117	2005	1:12000
Sac silty clay loam, loam substratum, 2 to 5 percent slopes	P30B	13531	432696	2wxrd	mn133	2002	1:12000
Sac silty clay loam, 5 to 10 percent slopes, eroded	P30C2	157	432697	gj7z	mn133	2002	1:12000

Map of Series Extent

Approximate geographic distribution of the SAC 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).