Official Series Description


Lab Data Summary

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

Click the image to view it full size.



Click the image to view it full size.

Sibling Summary

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

Click the image to view it full size.

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

Click the image to view it full size.

Geomorphic description summaries for the PENHOOK 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 .

Click the image to view it full size.

Click the image to view it full size.

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.

Competing Series

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

Click the image to view it full size.

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

Click the image to view it full size.

Geomorphic description summaries for the PENHOOK 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 .

Click the image to view it full size.

Click the image to view it full size.

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 PENHOOK, 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. VA-2010-11-05-12 | Culpeper County -

    Relationship of soils and landscape in the Southern Piedmont Schist and Metamonzonite (Soil Survey of Culpeper County, Virginia).

Map Units

Map units containing PENHOOK 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
Penhook silt loam, 2 to 10 percent slopes, moderately erodedPeC224423985262lhvtnc19719601:15840
Penhook silt loam, 10 to 25 percent slopesPeE15523985272lhvvnc19719601:15840
Penhook loam, 2 to 7 percent slopes31B1833824794292p71lva02920101:24000
Bentley-Penhook complex, 2 to 7 percent slopes7B727824793572p6z8va02920101:24000
Appomattox-Penhook complex, 2 to 7 percent slopes3B376024793442p6yvva02920101:24000
Penhook silt loam, 2 to 7 percent slopes44B253617264061vygjva04720061:24000
Penhook silt loam, 7 to 15 percent slopes44C212017264071vygkva04720061:24000
Penhook silt loam, 7 to 15 percent slopes35C4777189529821m6nva06120061:12000
Penhook silt loam, 2 to 7 percent slopes35B2215189529721m6mva06120061:12000
Littlejoe-Strawfield-Penhook complex, 8 to 15 percent slopes26C4623582008mjmgva06720041:24000
Littlejoe-Strawfield-Penhook complex, 15 to 25 percent slopes26D2528582009mjmhva06720041:24000
Goblintown-Drapermill-Penhook complex, 25 to 60 percent slopes18E381581980mjlkva06720041:24000
Littlejoe-Penhook-Goblintown complex, 8 to 15 percent slopes25C189582002mjm8va06720041:24000
Littlejoe-Penhook-Goblintown complex, 15 to 25 percent slopes25D150582004mjmbva06720041:24000
Penhook-Strawfield complex, 25 to 45 percent slopes39E988210866528s7gva14120081:24000
Penhook-Strawfield complex, 8 to 15 percent slopes39C738210866328s7dva14120081:24000
Goblintown-Penhook complex, 25 to 45 percent slopes28E5722027587261w1va14120081:24000
Penhook-Goblintown complex, 8 to 15 percent slopes38C39414742761lh39va14120081:24000
Goblintown-Penhook complex, 15 to 25 percent slopes28D2292027586261w0va14120081:24000
Penhook-Strawfield complex, 15 to 25 percent slopes39D63210866428s7fva14120081:24000

Map of Series Extent

Approximate geographic distribution of the PENHOOK 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 .