Soil Data Explorer - PIRUM

Official Series Description

Lab Data Summary

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

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

Competing Series

Soil series competing with PIRUM 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 PIRUM 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 PIRUM 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 flats position figure.

Soil series sharing subgroup-level classification with PIRUM, 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 PIRUM 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
Pirum fine sandy loam, 25 to 60 percent slopes	PmF	7830	331452	c3x0	al117	1982	1:24000
Zafra-Carnasaw-Pirum complex, 8 to 20 percent slopes	96	47307	3179435	lyq2	ar019	1983	1:20000
Pirum-Sherless-Shermore fine sandy loams, 3 to 8 percent slopes	54	17633	3179389	30x8y	ar019	1983	1:20000
Pirum-Zafra-Clebit complex, 3 to 8 percent slopes	55	15272	3179390	lynm	ar019	1983	1:20000
Pirum fine sandy loam, 3 to 8 percent slopes	53	253	3179388	lynk	ar019	1983	1:20000
Carnasaw-Pirum-Clebit complex, 20 to 40 percent slopes	21	53850	565606	lzkc	ar051	1986	1:20000
Pirum-Clebit-Carnasaw complex, 40 to 60 percent slopes	30	16964	565616	lzkp	ar051	1986	1:20000
Pirum-Clebit-Carnasaw complex, 20 to 40 percent slopes	29	11723	565614	lzkm	ar051	1986	1:20000
Carnasaw-Pirum complex, 8 to 20 percent slopes	20	8457	565605	lzkb	ar051	1986	1:20000
Carnasaw-Pirum complex, 3 to 8 percent slopes	19	4096	565603	lzk8	ar051	1986	1:20000
Clebit-Pirum-Rock outcrop complex, 3 to 15 percent slopes	24	2961	565609	lzkg	ar051	1986	1:20000
Carnasaw-Pirum-Clebit complex, 40 to 60 percent slopes	22	2130	565607	lzkd	ar051	1986	1:20000
Pirum-Clebit-Carnasaw complex, 8 to 20 percent slopes	28	1892	565613	lzkl	ar051	1986	1:20000
Pirum-Sherless-Shermore fine sandy loams, 3 to 8 percent slopes	54	26850	3179279	30x8y	ar059	1983	1:20000
Zafra-Carnasaw-Pirum complex, 8 to 20 percent slopes	96	18675	3179325	lyq2	ar059	1983	1:20000
Pirum-Zafra-Clebit complex, 3 to 8 percent slopes	55	4930	3179280	lynm	ar059	1983	1:20000
Pirum fine sandy loam, 3 to 8 percent slopes	53	1253	3179278	lynk	ar059	1983	1:20000
Pirum-Sherwood association, undulating	PsB	12505	565707	lznm	ar061	1970	1:24000
Pirum-Pickens association, undulating (bismarck)	PpB	10914	565706	lznl	ar061	1970	1:24000
Pirum fine sandy loam, 3 to 8 percent slopes	PmC	940	565705	lznk	ar061	1970	1:24000
Carnasaw-Pirum complex, 3 to 15 percent slopes, very rocky	13CD	4539	577480	2y1nd	ar097	1997	1:24000
Octavia-Caston-Pirum complex, 35 to 60 percent slopes, very rubbly	41G	1904	577488	mcxn	ar097	1997	1:24000
Clebit-Caston-Pirum complex, 35 t0 60 percent slopes, very rubbly	21G	1884	577477	mcx9	ar097	1997	1:24000
Pirum-Sherless complex, 1 to 8 percent slopes	42C	440	577528	mcyy	ar097	1997	1:24000
Carnasaw-Pirum-Clebit association, steep	7	104880	566108	m02k	ar105	1980	1:20000
Carnasaw-Pirum-Clebit association, rolling	6	92880	566107	m02j	ar105	1980	1:20000
Carnasaw-Pirum association, undulating	5	25570	566106	m02h	ar105	1980	1:20000
Clebit-Carnasaw-Pirum association, very steep	9	8940	566110	m02m	ar105	1980	1:20000
Carnasaw-Pirum complex, 3 to 15 percent slopes, very rocky	14	2227	1542873	2y1nd	ar109	2005	1:20000
Pirum-Sherless-Bonnerdale complex, 1 to 8 percent slopes	67	1694	1542883	1nshf	ar109	2005	1:20000
Clebit-Carnasaw-Pirum complex, 3 to 15 percent slopes, rubbly	21	347	1542875	1nsh5	ar109	2005	1:20000
Octavia-Caston-Pirum complex, 35 to 60 percent slopes, very rubbly	29G	10297	570864	m50z	ar113	1991	1:20000
Carnasaw-Pirum complex, 3 to 15 percent slopes, very rocky	11CD	3366	570855	2y1nd	ar113	1991	1:20000
Clebit-Carnasaw-Pirum complex, 15 to 35 percent slopes, very rubbly	15F	2972	570882	m51k	ar113	1991	1:20000
Clebit-Carnasaw-Pirum complex, 3 to 15 percent slopes, very rubbly	15CD	1951	570858	m50s	ar113	1991	1:20000
Carnasaw-Townley-Pirum association, steep	12	65669	566219	m064	ar125	1976	1:20000
Carnasaw-Pirum-Townley association, undulating	11	1546	566218	m063	ar125	1976	1:20000
Carnasaw-Pirum complex, 3 to 15 percent slopes, rubbly	NG252	3115	2495400	1qfww	ar149	1985	1:20000
Clebit-Caston-Pirum complex, 35 to 60 percent slopes, very rubbly	NG287	17	2495394	1qg07	ar149	1985	1:20000
Pirum-Octavia-Panama complex, 35 to 60 percent slopes, rubbly	NG327	3	2577847	1qfy5	ar149	1985	1:20000
Carnasaw-Pirum-Clebit association, 3 to 12 percent slopes	8	52942	571526	m5qb	ok077	1980	1:24000
Pirum-Carnasaw-Panama association, 12 to 25 percent slopes	30	15916	571500	m5ph	ok077	1980	1:24000
Carnasaw-Pirum complex, 3 to 8 percent slopes	7	3986	571525	m5q9	ok077	1980	1:24000
Clebit-Pirum complex, 5 to 12 percent slopes	12	3316	571480	m5nv	ok077	1980	1:24000
Clebit-Pirum-Rock outcrop complex, 15 to 40 percent slopes	13	2063	571481	m5nw	ok077	1980	1:24000
Pirum fine sandy loam, 3 to 5 percent slopes	29	1118	571498	m5pf	ok077	1980	1:24000
Pirum fine sandy loam, 1 to 3 percent slopes	28	553	571497	m5pd	ok077	1980	1:24000
Carnasaw-Pirum complex, 15 to 35 percent slopes	12	63130	571394	m5l2	ok079	1981	1:24000
Pirum-Octavia-Panama association, 30 to 50 percent slopes	53	37707	571439	m5mj	ok079	1981	1:24000
Bengal-Pirum-Clebit complex, 5 to 15 percent slopes	5	33978	571435	m5md	ok079	1981	1:24000
Pirum-Clebit complex, 3 to 5 percent slopes	51	21439	571437	m5mg	ok079	1981	1:24000
Pirum-Carnasaw-Caston complex, 35 to 60 percent slopes, cool	50	20199	571436	m5mf	ok079	1981	1:24000
Carnasaw-Pirum complex, 4 to 15 percent slopes	11	8947	571393	m5l1	ok079	1981	1:24000
Clebit-Carnasaw-Pirum complex, 4 to 35 percent slopes, cool	16	7644	571398	m5l6	ok079	1981	1:24000
Pirum-Clebit complex, 3 to 5 percent slopes, eroded	52	5077	571438	m5mh	ok079	1981	1:24000
Carnasaw-Pirum-Clebit association, 12 to 20 percent slopes	11	197325	571261	m5fs	ok127	1977	1:24000
Carnasaw-Pirum-Clebit association, 12 to 20 percent slopes, dry	12	75164	571262	m5ft	ok127	1977	1:24000
Clebit-Pirum-Carnasaw association, 20 to 45 percent slopes	18	73852	571268	m5g0	ok127	1977	1:24000
Clebit-Pirum-Carnasaw association, 20 to 45 percent slopes, dry	19	33206	571269	m5g1	ok127	1977	1:24000

Map of Series Extent

Approximate geographic distribution of the PIRUM 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).