Official Series Description


Lab Data Summary

Aggregate lab data for the WALFORD soil series. This aggregation is based on all pedons with a current taxon name of WALFORD, 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 WALFORD were used in the calculation. Source: KSSL snapshot . Methods used to assemble the KSSL snapshot used by SoilWeb / SDE

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Pedons used in the lab summary:

MLRALab IDPedon IDTaxonnameCINSSL / NASIS ReportsLink To SoilWeb GMap
105UMN2087S1975MN055065Walford3Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties43.7326153,-91.3772381
105X49-160-1S1983IA097009Walford2Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties42.0540562,-90.4141649

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the WALFORD 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 WALFORD 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 WALFORD 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 WALFORD 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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There are insufficient data to create the 3D mountains figure.

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

Competing Series

Soil series competing with WALFORD 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 WALFORD series and competing. 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 WALFORD 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 .

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Click the image to view it full size.

There are insufficient data to create the 3D mountains figure.

Click the image to view it full size.

Click the image to view it full size.

Soil series sharing subgroup-level classification with WALFORD, 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. IA-2010-09-09-10 | Cedar County - 2009

    Typical pattern of soils and parent material in the Atterberry-Tama-Muscatine association (Soil Survey of Cedar County, Iowa; 2009).

  2. IA-2011-05-31-53 | Jackson County - 1992

    Typical pattern of soils and parent material in the Walford-Atterberry-Downs association (Soil Survey of Jackson County, Iowa; 1992).

  3. IA-2011-06-01-22 | Muscatine County - 1989

    Typical pattern of soils and parent material in the Garwin-Muscatine-Tama association (Soil Survey of Muscatine County, Iowa; 1989).

Map Units

Map units containing WALFORD 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
Walford silt loam, terrace, 0 to 2 percent slopes116011284028132yvk5ia01119771:15840
Walford silt loam, 0 to 2 percent slopes160133013970722yvk1ia03120081:12000
Walford silt loam, terrace, 0 to 2 percent slopes116044013970552yvk5ia03120081:12000
Walford silt loam, 0 to 1 percent slopes1601402404353fkrnia04519781:15840
Walford silt loam, benches, 0 to 1 percent slopes1160638404334fkr1ia04519781:15840
Walford silt loam, terrace, 0 to 2 percent slopes11602037579342yvk5ia09520051:12000
Walford silt loam, benches, 0 to 2 percent slopes11602132407439fnz6ia09719881:15840
Walford silt loam, 0 to 2 percent slopes16030204079492yvk1ia10319791:15840
Walford-Atterberry silt loams, 1 to 3 percent slopes16110974079502yvk4ia10319791:15840
Walford silt loam, terrace, 0 to 2 percent slopes11605204079262yvk5ia10319791:15840
Walford silt loam, terrace, 0 to 2 percent slopesT1608494086992yvk5ia11319701:15840
Walford silt loam, 0 to 2 percent slopes1602984085432yvk1ia11319701:15840
Walford silt loam, 0 to 2 percent slopes16021884087242yvk1ia11519841:15840
Walford silt loam, 0 to 2 percent slopes160105634099262yvk1ia13919861:15840
Walford-Urban land complex, 0 to 2 percent slopes4160152409976frm1ia13919861:15840
Walford silt loam, 0 to 2 percent slopes1605924108832yvk1ia16319891:15840
Walford silt loam1890378398245fcdmmn05519811:15840

Map of Series Extent

Approximate geographic distribution of the WALFORD 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 .