Soil Data Explorer - TROJAN

Official Series Description

Lab Data Summary

Aggregate lab data for the TROJAN soil series. This aggregation is based on all pedons with a current taxon name of TROJAN, 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 TROJAN were used in the calculation. Source: KSSL snapshot (updated 2020-03-18). 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 TROJAN 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 TROJAN 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 TROJAN 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 TROJAN 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 flats position figure.

Competing Series

Soil series competing with TROJAN 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 TROJAN 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 TROJAN 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 TROJAN, 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 TROJAN 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
Trojan-Erig complex, 15 to 30 percent slopes	322	7135	487232	jc05	ca604	1994	1:24000
Trojan stony sandy loam, 2 to 30 percent slopes	TrE	1925	3233114	2zmrw	ca614	1967	1:24000
Trojan stony sandy loam, 30 to 50 percent slopes	TrF	1364	3233116	2zmrx	ca614	1967	1:24000
Trojan-Sattley-Kyburz complex, 30 to 50 percent slopes	TTF	409	3233123	2zms0	ca614	1967	1:24000
Kyburz-Trojan complex, 9 to 30 percent slopes	FUE	250	3233065	2zmr3	ca614	1967	1:24000
Delleker-Kyburz-Trojan complex, 2 to 30 percent slopes	DLE	98	3233063	2zmr2	ca614	1967	1:24000
Kyburz-Rock outcrop-Trojan complex, 2 to 30 percent slopes	KRE	48	3233089	2zmrg	ca614	1967	1:24000
Kyburz-Trojan complex, 30 to 50 percent slopes	FUF	29	3233067	2zmr4	ca614	1967	1:24000
Trojan-Kilmerque families association, 2 to 9 percent slopes.	192	17937	470413	hshm	ca702	1984	1:24000
Trojan-Erig complex, 15 to 30 percent slopes	322im	1703	1899354	21rfh	ca703	1983	1:24000
Trojan-Inville-Patio families association, 0 to 35 percent slopes.	105	72231	471078	ht62	ca708	1984	1:24000
Klicker-Trojan families association, 0 to 35 percent slopes.	49	31190	471022	ht48	ca708	1984	1:24000
Inville-Patio-Trojan families association, 0 to 35 percent slopes.	33	19927	471006	ht3r	ca708	1984	1:24000
Trojan-Inville-Boomtowm families association, 0 to 35 percent slopes.	104	17762	471077	ht61	ca708	1984	1:24000
Patio-Trojan-De Masters families association, 0 to 35 percent slopes.	71	10566	471044	ht4z	ca708	1984	1:24000
Lithic Haploxerolls-Rock Outcrop-Trojan family association, 0 to 15 percent slopes.	56	9518	471029	ht4h	ca708	1984	1:24000
Wintoner-Trojan-De Masters families association, 0 to 15 percent slopes.	122	8395	471095	ht6m	ca708	1984	1:24000
Klicker-Trojan families-Aquolls association,0 to 15 percent slopes.	50	8137	471023	ht49	ca708	1984	1:24000
Klicker family-Klicker family, sedimentary-Trojan family, complex, 0 to 35 percent slopes.s	44	6519	471017	ht43	ca708	1984	1:24000
Trojan-Klicker families, rhyolitic association, 0 to 35 percent slopes.	108	5414	471081	ht65	ca708	1984	1:24000
Trojan-Klicker families association, 35 to 50 percent slopes.	107	4070	471080	ht64	ca708	1984	1:24000
Trojan-Kilmerque-Patio families association, 15 to 35 percent slopes.	106	3735	471079	ht63	ca708	1984	1:24000
Inville-Patio-Trojan families association, 35 to 50 percent slopes.	34	3334	471007	ht3s	ca708	1984	1:24000
Trojan family-Lithic Haploxerolls-Rouen family association, 0 to 15 percent slopes.	110	1769	471083	ht67	ca708	1984	1:24000
Trojan-Klicker-Wintoner families association, 0 to 35 percent slopes.	109	311	471082	ht66	ca708	1984	1:24000
Trojan-Erig complex, 15 to 30 percent slopes	322It	87	1528256	1n98l	ca708	1984	1:24000
Sattley-Shepan-Trojan families complex, 0 to 30 percent slopes.	258	10508	471267	htd5	ca713	1984	1:24000
Sattley-Shepan-Trojan families complex, 30 to 50 percent slopes.	259	7775	471268	htd6	ca713	1984	1:24000
Trojan-Sattley families complex, 0 to 30 percent slopes.	278	5451	471287	htdt	ca713	1984	1:24000
Fopiano-Trojan families-Rock outcrop complex, 30 to 50 percent slopes.	165	3615	471174	ht95	ca713	1984	1:24000
Fopiano-Trojan families complex, 30 to 50 percent slopes.	164	2265	471173	ht94	ca713	1984	1:24000
Trojan family, 5 to 50 percent slopes.	277	2045	471286	htds	ca713	1984	1:24000
Trojan-Sattley families complex, 30 to 70 percent slopes.	279	1812	471288	htdv	ca713	1984	1:24000
Klicker family-Klicker family, sedimentary-Trojan family, complex, 0 to 35 percent slopes.s	L44	31	1546211	1nwys	ca713	1984	1:24000
Kyburz-Trojan complex, 9 to 30 percent slopes	FUE	15482	3233064	2zmr3	ca719	1982	1:24000
Kyburz-Trojan complex, 30 to 50 percent slopes	FUF	10665	3233066	2zmr4	ca719	1982	1:24000
Kyburz-Rock outcrop-Trojan complex, 30 to 50 percent slopes	KRF	4975	464725	hll4	ca719	1982	1:24000
Kyburz-Rock outcrop-Trojan complex, 2 to 30 percent slopes	KRE	4727	3233088	2zmrg	ca719	1982	1:24000
Trojan-Sattley-Kyburz complex, 30 to 50 percent slopes	TTF	3692	3233122	2zms0	ca719	1982	1:24000
Kyburz-Trojan-Sierraville complex, 2 to 9 percent slopes	FUC	3243	464663	hlj4	ca719	1982	1:24000
Sierraville-Trojan-Kyburz complex, 2 to 30 percent slopes	SIE	2534	464793	hlnb	ca719	1982	1:24000
Trojan-Sattley-Kyburz complex, 2 to 30 percent slopes	TTE	2345	464813	hlnz	ca719	1982	1:24000
Delleker-Kyburz-Trojan complex, 2 to 30 percent slopes	DLE	1692	3233062	2zmr2	ca719	1982	1:24000
Kyburz-Trojan complex, 2 to 30 percent slopes, altered	FUE5	1611	464665	hlj6	ca719	1982	1:24000
Kyburz-Rock outcrop-Trojan complex, 30 to 50 percent slopes, eroded	KRF2	610	464726	hll5	ca719	1982	1:24000
Trojan-Sattley-Cryumbrepts, wet complex, 2 to 30 percent slopes	TUE	512	464815	hlp1	ca719	1982	1:24000
Kyburz-Trojan-Aquolls complex, 2 to 30 percent slopes	KVE	282	464729	hll8	ca719	1982	1:24000
Trojan stony sandy loam, 30 to 50 percent slopes	TrF	179	3233117	2zmrx	ca719	1982	1:24000
Trojan stony sandy loam, 2 to 30 percent slopes	TrE	82	3233115	2zmrw	ca719	1982	1:24000
Kyburz-Trojan complex, 30 to 50 percent slopes, terraced	FUF6	56	464667	hlj8	ca719	1982	1:24000
Trojan loam, warm, 0 to 3 percent slopes	TnA	657	506636	k063	ut609	1974	1:24000
Trojan loam, warm, 8 to 15 percent slopes	TnD	445	506637	k064	ut609	1974	1:24000

Map of Series Extent

Approximate geographic distribution of the TROJAN 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).