Soil Data Explorer - LOS ROBLES

Official Series Description

Lab Data Summary

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

Competing Series

Soil series competing with LOS ROBLES 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 LOS ROBLES 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 LOS ROBLES 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 flats position figure.

Soil series sharing subgroup-level classification with LOS ROBLES, 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 LOS ROBLES 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
Los Robles clay loam	Lm	1845	455822	h99y	ca013	1973	1:24000
Los Robles gravelly clay loam, moderately deep, 0 to 5 percent slopes	LvB	2940	459827	hfh4	ca097	1968	1:20000
Los Robles gravelly clay loam, 0 to 2 percent slopes	LuA	1706	459826	hfh3	ca097	1968	1:20000
Los Robles loam, 0 to 3 percent slopes	LcA	3600	460044	hfq4	ca607	1967	1:20000
Los Robles loam, seeped, 0 to 3 percent slopes	LdA	379	460046	hfq6	ca607	1967	1:20000
Los Robles loam, 3 to 8 percent	LcB	303	460045	hfq5	ca607	1967	1:20000
Los Robles loam, moderately deep, 0 to 5 percent slopes	LeB	274	460047	hfq7	ca607	1967	1:20000
Los Robles gravelly loam, 0 to 3 percent slopes	LfA	249	460048	hfq8	ca607	1967	1:20000
Los Robles clay loam, 0 to 3 percent slopes	Lk	3751	460809	hght	ca645	1961	1:20000
Los Robles loam, 0 to 3 percent slopes	Lo	934	460812	hghx	ca645	1961	1:20000
Los Robles clay loam, moderately deep, 0 to 3 percent slopes	Lm	480	460810	hghv	ca645	1961	1:20000
Los Robles cobbly loam, moderately deep, 0 to 3 percent slopes	Ln	105	460811	hghw	ca645	1961	1:20000
Los Robles clay loam, 0 to 2 percent slopes	LrA	982	457021	hbkm	ca646	1967	1:24000
Los Robles clay loam, 2 to 9 percent slopes	LrC	840	457022	hbkn	ca646	1967	1:24000
Los Robles loam, 0 to 3 percent slopes	LmA	1797	464370	hl6p	ca654	1966	1:24000
Los Robles loam, 3 to 9 percent slopes	LmB	971	464371	hl6q	ca654	1966	1:24000
Los Robles clay loam, 0 to 3 percent slopes	LoA	595	464373	hl6s	ca654	1966	1:24000
Los Robles sandy loam, 2 to 9 percent slopes	LbB	519	464368	hl6m	ca654	1966	1:24000
Los Robles loam, hard substratum, 2 to 9 percent slopes	LnB	206	464372	hl6r	ca654	1966	1:24000
Los Robles sandy loam, gravelly substratum 2 to 9 percent slopes	LgB	205	464369	hl6n	ca654	1966	1:24000
Los Robles-Trigo families-Orthents association, 30 to 60 percent slopes	24	48063	465290	hm5c	ca772	1981	1:24000
Agua Dulce-Los Robles-Modjeska families association, 10 to 60 percent slopes	3	43147	465296	hm5k	ca772	1981	1:24000
Vertic Xerochrepts-Los Robles families association, 10 to 60 percent slopes	48	3407	465316	hm66	ca772	1981	1:24000

Map of Series Extent

Approximate geographic distribution of the LOS ROBLES 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).