Soil Data Explorer - AYAR

Official Series Description

Lab Data Summary

Aggregate lab data for the AYAR soil series. This aggregation is based on all pedons with a current taxon name of AYAR, 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 AYAR were used in the calculation. Source: KSSL snapshot (updated 2020-03-13). 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	UCD5811014	58-CA-11-014	Ayar	2	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	39.4985657,-122.3289871

Water Balance

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

Select annual climate data summaries for the AYAR 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 AYAR 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).

Competing Series

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

Select annual climate data summaries for the AYAR 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 AYAR 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 mountains figure.

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

Soil series sharing subgroup-level classification with AYAR, 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

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

1. CA-2010-08-30-05 | Colusa County - 2006

   Typical pattern of soils on the western edge of the Sacramento Valley and on the Coast Range foothills (Soil Survey of Colusa County, California).

2. 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 AYAR 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
Ayar clay, 15 to 30 percent slopes	213	5122	461597	hhb7	ca011	1999	1:24000
Ayar clay, 5 to 15 percent slopes	212	3751	461596	hhb6	ca011	1999	1:24000
Balcom-Ayar complex, 30 to 50 percent slopes	271	907	461617	hhbw	ca011	1999	1:24000
Balcom-Ayar complex, 15 to 30 percent slopes	270	817	461616	hhbv	ca011	1999	1:24000
Ayar clay, 3 to 15 percent slopes	AxC	1158	458588	hd65	ca021	1961	1:20000
Ayar-Nacimiento clays, 10 to 30 percent slopes	AyD	558	458589	hd66	ca021	1961	1:20000
Ayar silty clay, 15 to 30 percent slopes	AyE	2040	455560	h91h	ca053	1972	1:24000
Ayar silty clay, 5 to 15 percent slopes	AyD	1495	455559	h91g	ca053	1972	1:24000
Ayar silty clay, 30 to 50 percent slopes	AyF	790	455561	h91j	ca053	1972	1:24000
Diablo-Ayar clays, 9 to 30 percent slopes, eroded	DaE2	20574	456077	h9l5	ca095	1969	1:24000
Diablo-Ayar clays, 2 to 9 percent slopes	DaC	7485	456076	h9l4	ca095	1969	1:24000
Ayar-Oneil complex, 30 to 50 percent slopes	420	1000	466970	hnxk	ca642	1998	1:24000
Ayar clay, 30 to 50 percent slopes	410	815	466969	hnxj	ca642	1998	1:24000
Ayar-Arburua complex, 15 to 30 percent slopes	128	2600	462780	hjkd	ca647	1984	1:24000
Ayar clay, 30 to 50 percent slopes	126	1830	462778	hjkb	ca647	1984	1:24000
Ayar clay, 5 to 8 percent slopes	123	1700	462775	hjk7	ca647	1984	1:24000
Ayar-Oneil complex, 30 to 50 percent slopes	130	1670	462782	hjkg	ca647	1984	1:24000
Ayar clay 15 to 30 percent slopes	125	910	462777	hjk9	ca647	1984	1:24000
Ayar-Arburua complex, 8 to 15 percent slopes, MLRA 15	127	840	462779	2tz0p	ca647	1984	1:24000
Ayar clay, 8 to 15 percent slopes	124	600	462776	hjk8	ca647	1984	1:24000
Ayar-Arburua complex, 30 to 50 percent slopes	129	500	462781	hjkf	ca647	1984	1:24000
Ayar-Arburua complex, 8 to 15 percent slopes, MLRA 15	827	918	467150	2tz0p	ca653	2000	1:24000
Ayar clay, 5 to 8 percent slopes	823	537	467149	hp3b	ca653	2000	1:24000
Nacimiento-Ayar complex, 9 to 30 percent slopes	177	15695	457280	hbtz	ca665	1977	1:24000
Ayar and Diablo soils, 15 to 30 percent slopes	110	8525	457213	hbrt	ca665	1977	1:24000
Nacimiento-Ayar complex, 30 to 50 percent slopes	178	6260	457281	hbv0	ca665	1977	1:24000
Ayar and Diablo soils, 9 to 15 percent slopes	109	5610	457212	hbrs	ca665	1977	1:24000
Millsholm-Ayar complex, 50 to 75 percent slopes	168	3415	457271	hbtp	ca665	1977	1:24000
Ayar and Diablo soils, 30 to 50 percent slopes	111	2530	457214	hbrv	ca665	1977	1:24000
Ayar-Hillbrick-Aido complex, 50 to 75 percent slopes	112	7718	463657	hkgp	ca666	1983	1:24000
Ayar-Bluestone complex, 9 to 30 percent slopes	110	4819	463655	hkgm	ca666	1983	1:24000
Ayar-Hillbrick-Aido complex, 30 to 50 percent slopes	111	4491	463656	hkgn	ca666	1983	1:24000
Ayar silty clay, 5 to 9 percent slopes	109	298	463654	hkgl	ca666	1983	1:24000
Millsholm variant-Ayar association, 50 to 75 percent slopes	199	185	463744	hkkh	ca666	1983	1:24000
Ayar-Hillbrick-Aido complex, 15 to 30 percent slopes	274	1630	458476	hd2k	ca667	2003	1:24000
Ayar-Hillbrick-Aido complex, 30 to 50 percent slopes	275	885	458477	hd2l	ca667	2003	1:24000
Ayar clay, 15 to 30 percent slopes	271	740	458475	hd2j	ca667	2003	1:24000
Ayar silty clay, 5 to 9 percent slopes	270	250	458553	hd51	ca667	2003	1:24000
Ayar clay, 30 to 50 percent slopes, eroded	AhF2	5336	457560	hc40	ca673	1974	1:24000
Ayar clay, 50 to 75 percent slopes	AhG	1322	457561	hc41	ca673	1974	1:24000
Ayar clay, 15 to 30 percent slopes, eroded	AhE2	1178	457559	hc3z	ca673	1974	1:24000
Ayar clay loam, 5 to 15 percent slopes	AyD	1051	457804	hccw	ca675	1968	1:24000

Map of Series Extent

Approximate geographic distribution of the AYAR 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).