Soil Data Explorer - MARPA

Official Series Description

Lab Data Summary

Aggregate lab data for the MARPA soil series. This aggregation is based on all pedons with a current taxon name of MARPA, 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 MARPA were used in the calculation. Source: KSSL snapshot (updated 2020-03-18). Methods used to assemble the KSSL snapshot used by SoilWeb / SDE

Pedons used in the lab summary:

MLRA	Lab ID	Pedon ID	Taxonname	CI	NSSL / NASIS Reports	Link To SoilWeb GMap
15	UCD7245173	72-CA-45-173x	MARPA	3	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	40.7866516,-122.5303116
5	UCD6145114	61-CA-45-114	MARPA	2	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	40.7647324,-122.0218658

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the MARPA 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 MARPA series. Sketches are arranged according to their subgroup-level taxonomic structure. Source: SSURGO snapshot (updated 2024-02-21), parsed OSD records (updated 2023-10-06) and snapshot of SC database (updated 2023-10-02).

Select annual climate data summaries for the MARPA 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 MARPA 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).

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 MARPA share the same family level classification in Soil Taxonomy. Source: parsed OSD records (updated 2023-10-06) and snapshot of the SC database (updated 2023-10-02).

Select annual climate data summaries for the MARPA 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 MARPA 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 terrace figure.

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

Soil series sharing subgroup-level classification with MARPA, 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 MARPA 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
Etsel-Maymen-Marpa association, 30 to 50 percent slopes	526	18324	461641	hhcn	ca011	1999	1:24000
Neuns-Marpa-Goulding complex, 30 to 50 percent slopes	590	12706	461650	hhcy	ca011	1999	1:24000
Bamtush-Marpa complex, 30 to 50 percent slopes	651	1755	461659	hhd7	ca011	1999	1:24000
Bamtush-Marpa complex, 15 to 30 percent slopes	650	587	461658	hhd6	ca011	1999	1:24000
Speaker-Maymen-Marpa association, 30 to 50 percent slopes	225	14596	459628	hf8q	ca033	1985	1:24000
Speaker-Marpa-Sanhedrin gravelly loams, 30 to 50 percent slopes	224	9201	459627	hf8p	ca033	1985	1:24000
Speaker-Maymen-Marpa association, 50 to 75 percent slopes	226	6188	459629	hf8r	ca033	1985	1:24000
Speaker-Marpa-Sanhedrin gravelly loams, 30 to 50 percent slopes	224l		1607740	1qyzl	ca097	1968	1:20000
Speaker-Maymen-Marpa association, 50 to 75 percent slopes	226l		1607741	1qyzm	ca097	1968	1:20000
Marpa-Kinkel-Boomer, cool complex, 15 to 50 percent slopes	184	80230	459093	hdqg	ca602	1978	1:24000
Marpa-Kinkel-Boomer, cool complex, 5 to 15 percent slopes	183	5800	459092	hdqf	ca602	1978	1:24000
MARPA-HOOSIMBIM-BAMTUSH COMPLEX, 50 TO 75 PERCENT SLOPES	171	12591	466072	hmzl	ca606	1990	1:24000
HOOSIMBIM-BAMTUSH-MARPA COMPLEX, 30 TO 50 PERCENT SLOPES	157	3832	466060	hmz6	ca606	1990	1:24000
MARPA-VITZTHUM COMPLEX, 50 TO 75 PERCENT SLOPES	172	1873	466073	hmzm	ca606	1990	1:24000
GOULDING-HOLKAT VARIANT-MARPA VARIANT COMPLEX, 50 TO 75 PERCENT SLOPES	145	767	466047	hmys	ca606	1990	1:24000
MARPA VARIANT-GOULDING-HOLKAT VARIANT COMPLEX, 30 TO 50 PERCENT SLOPES	173	745	466074	hmzn	ca606	1990	1:24000
MARPA-HOOSIMBIM COMPLEX, 30 TO 50 PERCENT SLOPES	170	384	466071	hmzk	ca606	1990	1:24000
Marpa gravelly loam, 50 to 75 percent slopes	MaG	11916	460053	hfqf	ca607	1967	1:20000
Marpa gravelly loam, 30 to 50 percent slopes	MaE	5678	460052	hfqd	ca607	1967	1:20000
Marpa-Kinkel-Boomer, cool complex, 15 to 50 percent slopes	184sc	5116	1905934	21z8r	ca702	1984	1:24000
Marpa-Kinkel-Boomer, cool complex, 5 to 15 percent slopes	183sc	221	1905932	21z8p	ca702	1984	1:24000
Marpa-Goulding families association, 40 to 60 percent slopes.	179	36691	470777	hswc	ca707	1983	1:24000
Marpa-holland, deep families complex, 40 to 60 percent slopes.	183	33757	470781	hswh	ca707	1983	1:24000
Marpa-Neuns families complex, 40 to 60 percent slopes.	187	25656	470785	hswm	ca707	1983	1:24000
Marpa family, 40 to 60 percent slopes.	175	24561	470773	hsw7	ca707	1983	1:24000
Neuns-Marpa families complex, 60 to 80 percent slopes.	219	17507	470817	hsxn	ca707	1983	1:24000
Neuns-Marpa families complex, 40 to 60 percent slopes.	218	15505	470816	hsxm	ca707	1983	1:24000
Marpa-Holland, deep families complex, 20 to 40 percent slopes.	182	11902	470780	hswg	ca707	1983	1:24000
Marpa family, 20 to 40 percent slopes.	174	7456	470772	hsw6	ca707	1983	1:24000
Marpa-Chawanakee families complex, 40 to 60 percent slopes.	177	7249	470775	hsw9	ca707	1983	1:24000
Marpa-Neuns families complex, 60 to 80 percent slopes.	188	6892	470786	hswn	ca707	1983	1:24000
Goulding-Marpa families association, 40 to 60 percent slopes.	83	6746	470681	hss8	ca707	1983	1:24000
Marpa family-Marpa family, deep complex, 40 to 60 percent slopes.	185	6620	470783	hswk	ca707	1983	1:24000
Marpa family, 60 to 80 percent slopes.	176	5897	470774	hsw8	ca707	1983	1:24000
Holland, deep-Marpa families complex, 20 to 40 percent slopes.	123	5679	470721	hstk	ca707	1983	1:24000
Marpa-Goulding families association, 60 to 80 percent slopes.	180	4881	470778	hswd	ca707	1983	1:24000
Huntmount-Hugo-Marpa, deep families complex, 15 to 45 percent slopes.	145	4841	470743	hsv8	ca707	1983	1:24000
Marpa-Goulding families association, 20 to 40 percent slopes.	178	4628	470776	hswb	ca707	1983	1:24000
Marpa family, deep, 40 to 60 percent slopes.	189	4059	470787	hswp	ca707	1983	1:24000
Neuns-Marpa, deep families complex, 40 to 60 percent slopes.	221	4018	470819	hsxq	ca707	1983	1:24000
Holland, deep-Marpa families complex, 40 to 60 percen slopes.	124	3834	470722	hstl	ca707	1983	1:24000
Marpa, deep-Deadwood families association, 40 to 60 percent slopes.	190	2770	470788	hswq	ca707	1983	1:24000
Marpa-Holland, deep families association, 60 to 80 percent slopes.	184	2704	470782	hswj	ca707	1983	1:24000
Marpa-Holland, deep families complex, 0 to 20 percent slopes.	181	2695	470779	hswf	ca707	1983	1:24000
Marpa-Neuns families complex, 20 to 40 percent slopes.	186	2288	470784	hswl	ca707	1983	1:24000
Marpa-Hoosimbim-Bamtush complex, 50 to 75 percent slopes	171tw	1989	1868807	20qn3	ca707	1983	1:24000
Neuns-Marpa-Deadwood families complex, 40 to 60 percent slopes.	220	1933	470818	hsxp	ca707	1983	1:24000
Holland-Marpa families, deep, 40 to 60 percent slopes.	125	1810	470723	hstm	ca707	1983	1:24000
Marpa gravelly loam, 50 to 75 percent slopes	MaGsh	765	1868424	20q7r	ca707	1983	1:24000
Marpa-Vitzthum complex, 50 to 75 percent slopes	172tw	502	1868810	20qn6	ca707	1983	1:24000
Hoosimbim-Bamtush-Marpa complex, 30 to 50 percent slopes	157tw	338	1868786	20qmf	ca707	1983	1:24000
Marpa gravelly loam, 30 to 50 percent slopes	MaEsh	323	1868422	20q7p	ca707	1983	1:24000
Marpa-Kinkel-Boomer, cool complex, 15 to 50 percent slopes	184sc	107	1867674	20pgk	ca707	1983	1:24000
Marpa variant-Goulding-Holkat variant complex, 30 to 50 percent slopes	173tw	76	1868813	20qn9	ca707	1983	1:24000
Marpa-Kinkel-Boomer, cool complex, 5 to 15 percent slopes	183sc	10	1867672	20pgh	ca707	1983	1:24000

Map of Series Extent

Approximate geographic distribution of the MARPA 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).