Soil Data Explorer - ERA

Official Series Description

Lab Data Summary

Aggregate lab data for the ERA soil series. This aggregation is based on all pedons with a current taxon name of ERA, 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 ERA 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
10	90P0184	89OR031013	Era	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	44.6333351,-121.0833359

Water Balance

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

There are insufficient data to create the 3D flats position figure.

Competing Series

Soil series competing with ERA 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 ERA 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 ERA 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 mountains figure.

Soil series sharing subgroup-level classification with ERA, 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

No block diagrams are available.

Map Units

Map units containing ERA 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
Era ashy sandy loam, 3 to 8 percent slopes	122	5957	3434747	2mph	or618		1:24000
Meadowridge-Era complex, 1 to 12 percent slopes	109	5349	3434815	2mr9	or618		1:24000
Meadowridge-Agentia-Era complex, 35 to 60 percent north slopes	038	4716	3434824	2mqc	or618		1:24000
Era ashy sandy loam, 0 to 3 percent slopes	121	4515	3437649	2mpg	or618		1:24000
Lickskillet-Era-Meadowridge complex, 0 to 25 percent slopes	217	4030	3434905	1sgvy	or618		1:24000
Searles-Meadowridge-Era complex, bouldery, 2 to 40 percent south slopes	115	2969	3437637	2mt0	or618		1:24000
Agentia-Era complex, 40 to 70 percent north slopes	036	2646	3434975	2mms	or618		1:24000
Era cobbly ashy sandy loam, 3 to 12 percent slopes	222	2231	3437640	2mpj	or618		1:24000
Era ashy sandy loam, moist, 12 to 35 percent north slopes	223	1205	3437444	2mrr	or618		1:24000
Era complex, moist, 2 to 40 percent north slopes	163	1042	3434993	2mtd	or618		1:24000
Era cobbly ashy sandy loam, 10 to 40 percent south slopes	179	651	3434896	wg1h	or618		1:24000
Era ashy loam, 0 to 3 percent slopes	098	560	3434876	2mtg	or618		1:24000
Meadowridge-Era-Searles complex, bouldery, 2 to 40 percent north slopes	208	469	3434848	wg3l	or618		1:24000
Era sandy loam, cobbly substratum, 0 to 3 percent slopes	45A	10323	63724	249m	or620	1992	1:24000
Era sandy loam, 3 to 8 percent slopes	44B	878	63715	249b	or620	1992	1:24000
Era-Haystack complex, 0 to 8 percent slopes	46B	726	63733	249x	or620	1992	1:24000
Era soils, 8 to 40 percent slopes	ErE	6000	62893	23ft	or666	1970	1:31680
Era soils, 1 to 8 percent slopes	ErB	3990	62892	23fs	or666	1970	1:31680
Era sandy loam, cobbly substratum, 0 to 3 percent slopes	5	600	62865	23dx	or666	1970	1:31680

Map of Series Extent

Approximate geographic distribution of the ERA 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).