Official Series Description


Lab Data Summary

Aggregate lab data for the SAN TIMOTEO soil series. This aggregation is based on all pedons with a current taxon name of SAN TIMOTEO, 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 SAN TIMOTEO were used in the calculation. Source: KSSL snapshot . 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 SAN TIMOTEO 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.

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Sibling Summary

Siblings are those soil series that occur together in map units, in this case with the SAN TIMOTEO series. Sketches are arranged according to their subgroup-level taxonomic structure. Source: SSURGO snapshot , parsed OSD records and snapshot of SC database .

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Select annual climate data summaries for the SAN TIMOTEO series and siblings. Series are sorted according to hierarchical clustering of median values. Source: SSURGO map unit geometry and 1981-2010, 800m PRISM data .

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Geomorphic description summaries for the SAN TIMOTEO 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 .

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Click the image to view it full size.

Click the image to view it full size.

Click the image to view it full size.

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

Competing Series

Soil series competing with SAN TIMOTEO share the same family level classification in Soil Taxonomy. Source: parsed OSD records and snapshot of the SC database .

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Select annual climate data summaries for the SAN TIMOTEO series and competing. Series are sorted according to hierarchical clustering of median values. Source: SSURGO map unit geometry and 1981-2010, 800m PRISM data .

There are insufficient data to create the annual climate figure.

Geomorphic description summaries for the SAN TIMOTEO 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 .

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 SAN TIMOTEO, 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 .

Block Diagrams

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

  1. CA-2012-05-08-20 | San Luis Obispo County, Carrizo Plain Area - 2003

    Idealized cross-section of the northwestern part of the survey area, showing soil-landscape-geology relationships (Soil Survey of San Luis Obispo County, California, Carrizo Plain Area; 2003).

Map Units

Map units containing SAN TIMOTEO 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
San Timoteo gravelly loam, 30 to 75 percent slopesSeG2125455717h96kca05319721:24000
Wisflat-Arburua-San Timoteo complex, 30 to 50 percent slopes, MLRA 1527574254621672xgtsca07719901:24000
Wisflat-Arburua-San Timoteo complex, 50 to 75 percent slopes, MLRA 1527631004621682xgtrca07719901:24000
Wisflat-Arburua-San Timoteo complex, 50 to 75 percent slopes, MLRA 15501197204669732xgtrca64219981:24000
Wisflat-Arburua-San Timoteo complex, 30 to 50 percent slopes, MLRA 15500160004669722xgtsca64219981:24000
San Timoteo-Wisflat sandy loams complex, 8 to 15 percent slopes2501110462902hjpbca64719841:24000
San Timoteo sandy loam, 2 to 8 prcent slopes249650462901hjp9ca64719841:24000
San Timoteo-Wisflat sandy loams complex, 15 to 30 percent slopes251520462903hjpcca64719841:24000
San Timoteo-San Andreas-Bellyspring complex, 30 to 50 percent slopes29115015458482hd2rca66720031:24000
San Timoteo-San Andreas-Bellyspring complex, 50 to 75 percent slopes2928000458483hd2sca66720031:24000
San Timoteo-San Andreas-Bellyspring complex, 15 to 30 percent slopes2902975458481hd2qca66720031:24000
Seaback-San Timoteo complex, 50 to 75 percent slopes2292475458463hd24ca66720031:24000
San Timoteo loam, 30 to 50 percent slopes, erodedSgF22430457986hckrca67719721:24000
San Timoteo loam, 8 to 25 percent slopes, erodedSmE2wr114839951lt6tca67719721:24000
San Timoteo loam, 8 to 25 percent slopes, erodedSmE23830458365hcyzca67919671:15840
San Timoteo loam, 25 to 50 percent slopes, erodedSmF23208458366hcz0ca67919671:15840
San Timoteo-San Andreas-Bellyspring complex, 30 to 50 percent slopes291cp114128611jf65ca77219811:24000

Map of Series Extent

Approximate geographic distribution of the SAN TIMOTEO 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 .