Soil Data Explorer - TRACY

Official Series Description

Lab Data Summary

Aggregate lab data for the TRACY soil series. This aggregation is based on all pedons with a current taxon name of TRACY, 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 TRACY 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
98	LP7801	1978IN091001	Tracy	2	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	41.4426333,-86.9238667
98	40A5298	S1970IN127001	Tracy	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	41.3675003,-87.035553
n/a	40A5294	S1970IN091001	Tracy	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	n/a

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the TRACY 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 TRACY 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 TRACY 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 TRACY 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 TRACY 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 TRACY 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 TRACY 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 flats position figure.

Soil series sharing subgroup-level classification with TRACY, 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

Click a link below to display the diagram. Note that these diagrams may be from multiple survey areas.

1. IN-2010-09-27-04 | St. Joseph County -

   Typical pattern of soils and underlying material in the Coloma-Oshtemo-Brady association (Soil Survey of St. Joseph County, Indiana).

2. IN-2010-09-27-06 | St. Joseph County -

   Typical pattern of soils and underlying material in the Coupee-Tracy association (Soil Survey of St. Joseph County, Indiana).

3. IN-2010-09-27-07 | St. Joseph County -

   Typical pattern of soils and underlying material in the Tracy-Hillsdale-Tyner association (Soil Survey of St. Joseph County, Indiana).

4. IN-2012-01-19-35 | Lake County - July 1972

   Oakville-Tawas, Plainfield-Watseka, Maumee-Bono-Warners, and Alida-Del Rey-Whitaker soil associations. The Oakville-Tawas association is on the left (Soil Survey of Lake County, Indiana; 1972).

Map Units

Map units containing TRACY 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
Tracy loam, 2 to 6 percent slopes	TcB	1120	272500	94kb	in089	1967	1:15840
Tracy loam, 0 to 2 percent slopes	TcA	961	272499	94k9	in089	1967	1:15840
Tracy loam, 6 to 12 percent slopes	TcC	478	272501	94kc	in089	1967	1:15840
Tracy loam, silty clay loam substratum, 2 to 6 percent slopes	TrB	274	272502	94kd	in089	1967	1:15840
Tracy sandy loam, 2 to 6 percent slopes	TcB	32838	272695	2zdj8	in091	1979	1:15840
Tracy sandy loam, 0 to 2 percent slopes	TcA	21258	272694	2zdj7	in091	1979	1:15840
Tracy sandy loam, 6 to 12 percent slopes, moderately eroded	TcC2	13315	272696	2zdjb	in091	1979	1:15840
Tracy sandy loam, 12 to 18 percent slopes	TcD2	4877	272697	2zdjc	in091	1979	1:15840
Tracy sandy loam, 18 to 35 percent slopes	TcF	1239	272698	2zdjf	in091	1979	1:15840
Tracy sandy loam, 2 to 6 percent slopes	TcB	5888	160688	2zdj8	in127	1978	1:15840
Tracy sandy loam, 0 to 2 percent slopes	TcA	3951	160687	2zdj7	in127	1978	1:15840
Tracy sandy loam, 6 to 12 percent slopes	TcC	2704	160689	2zdj9	in127	1978	1:15840
Tracy sandy loam, 12 to 18 percent slopes	TcD	1363	160690	2zdjc	in127	1978	1:15840
Tracy sandy loam, 2 to 6 percent slopes	TmpB	6105	615114	2zdj8	in141	2001	1:12000
Tracy sandy loam, 6 to 12 percent slopes, moderately eroded	TmpC2	3402	615113	2zdjb	in141	2001	1:12000
Tracy sandy loam, 0 to 2 percent slopes	TmpA	2614	615112	2zdj7	in141	2001	1:12000
Urban land-Tracy complex, 2 to 6 percent slopes	UmwB	1650	615120	2zdjh	in141	2001	1:12000
Tracy sandy loam, 12 to 18 percent slopes	TmpD	1609	618534	2zdjc	in141	2001	1:12000
Urban land-Tracy complex, 0 to 2 percent slopes	UmwA	1326	615121	2zdjg	in141	2001	1:12000
Hillsdale-Tracy sandy loams, 5 to 10 percent slopes, eroded	HkpC2	1122	625136	nzhp	in141	2001	1:12000
Urban land-Tracy complex, 6 to 12 percent slopes	UmwC	557	615119	2zdjj	in141	2001	1:12000
Hillsdale-Tracy sandy loams, 10 to 18 percent slopes, eroded	HkpD2	547	625142	nzhw	in141	2001	1:12000
Urban land-Hillsdale-Tracy complex, 5 to 10 percent slopes	UhpC	502	625559	nzyb	in141	2001	1:12000
Urban land-Tracy complex, 12 to 18 percent slopes	UmwD	108	618535	2zdjk	in141	2001	1:12000
Urban land-Hillsdale-Tracy complex, 10 to 18 percent slopes	UhpD	63	625557	nzy8	in141	2001	1:12000

Map of Series Extent

Approximate geographic distribution of the TRACY 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).