Soil Data Explorer - GRASSNA

Official Series Description

Lab Data Summary

Aggregate lab data for the GRASSNA soil series. This aggregation is based on all pedons with a current taxon name of GRASSNA, 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 GRASSNA 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
53B	74ND029002	74ND029002	Grassna	4	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	45.9702778,-100.1497222
53B	80P0245	79ND015012	Grassna	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	46.9122222,-100.615
54	74ND057005	74ND057005	Grassna	4	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	47.2933333,-101.6344444

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the GRASSNA 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 GRASSNA 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 GRASSNA 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 GRASSNA 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 mountains figure.

Competing Series

Soil series competing with GRASSNA 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 GRASSNA 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 GRASSNA 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 terrace figure.

Soil series sharing subgroup-level classification with GRASSNA, 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. ND-2012-02-07-40 | Golden Valley County - July 1989

   Typical pattern of soils and parent material in the Chama-Golva-Cabba association (Soil Survey of Golden Valley County, North Dakota; July 1989).

Map Units

Map units containing GRASSNA 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
Grassna silt loam, 0 to 2 percent slopes	E2221A	645	3256724	2qz7l	mt109	1956	1:31680
Grassna silt loam, 0 to 2 percent slopes	C457A	4813	2596822	2q2y6	nd015	1967	1:20000
Grassna silt loam, loess, 0 to 2 percent slopes	E3813A	3785	2661709	2q515	nd015	1967	1:20000
Grassna silt loam, loess, 2 to 6 percent slopes	E3813B	735	2661710	2q516	nd015	1967	1:20000
Grassna silt loam, 2 to 6 percent slopes	C457B	195	2596824	2q53l	nd015	1967	1:20000
Grassna silt loam, 0 to 2 percent slopes	C457A	18698	2564302	2q2y6	nd029	1979	1:20000
Grassna silt loam, loess, 0 to 2 percent slopes	E3813A	7307	2661793	2q515	nd029	1979	1:20000
Omio-Grassna silt loams, 0 to 3 percent slopes	C724A	6385	2564347	2q6lf	nd029	1979	1:20000
Grassna silt loam, 2 to 6 percent slopes	C457B	4912	2564338	2q53l	nd029	1979	1:20000
Grassna silt loam, loess, 2 to 6 percent slopes	E3813B	3679	2661794	2q516	nd029	1979	1:20000
Omio-Grassna silt loams, 0 to 3 percent slopes	E3751A	1465	2661795	2q51f	nd029	1979	1:20000
Bryant-Grassna silt loams, 0 to 2 percent slopes	C745A	89	2596630	2qyg3	nd029	1979	1:20000
Grassna silt loam, 0 to 2 percent slopes	E2221A	4959	2707289	2qz7l	nd033	1985	1:24000
Grassna silt loam, strongly saline, 0 to 2 percent slopes, frequently flooded	E2222A	374	2707290	2q522	nd033	1985	1:24000
Bryant-Grassna silt loams, 0 to 2 percent slopes	C745A	16	2596762	2qyg3	nd051	1992	1:24000
Grassna silt loam, 0 to 2 percent slopes	C457A	2097	2566649	2q2y6	nd055	1974	1:20000
Grassna silt loam, loess, 0 to 2 percent slopes	E3813A	1833	2699267	2q515	nd057	1976	1:20000
Grassna silt loam, loess, 2 to 6 percent slopes	E3813B	405	2699268	2q516	nd057	1976	1:20000
Grassna silt loam, loess, 0 to 2 percent slopes	E3813A	2658	2525984	2q515	nd065	1971	1:20000
Grassna silt loam, loess, 2 to 6 percent slopes	E3813B	1380	2525985	2q516	nd065	1971	1:20000
Grassna silt loam, 0 to 2 percent slopes	E2221A	10782	2707420	2qz7l	nd087	1974	1:20000
Bryant-Grassna silt loams, 0 to 2 percent slopes	C745A	9165	2797914	2qyg3	sd021	1978	1:20000
Linton-Grassna silt loams, 0 to 2 percent slopes	C713A	8373	2797927	2rrrd	sd021	1978	1:20000
Grassna silt loam, 0 to 2 percent slopes	C457A	4617	2797871	2q2y6	sd021	1978	1:20000
Linton-Grassna silt loams, 0 to 3 percent slopes	21A	1994	354690	cx2m	sd021	1978	1:20000
Bryant-Grassna silt loams, 2 to 6 percent slopes	C745B	641	2797935	2rsq9	sd021	1978	1:20000
Grassna silt loam	4	192	354710	cx38	sd021	1978	1:20000
Bryant-Grassna silt loams, 0 to 3 percent slopes	68A	155	354738	cx45	sd021	1978	1:20000
Grassna silt loam, 2 to 6 percent slopes	C457B	7	2797901	2q53l	sd021	1978	1:20000
Grassna silt loam	Gs	1501	356166	cym7	sd031	1986	1:24000
Bryant-Grassna silt loams, 2 to 6 percent slopes	C745B	19492	2798610	2rsq9	sd045	1973	1:20000
Temvik-Grassna silt loams, 2 to 6 percent slopes	C742B	11483	2798608	2rsq5	sd045	1973	1:20000
Temvik-Grassna silt loams, 6 to 9 percent slopes	C742C	3193	2798609	2rsq6	sd045	1973	1:20000
Grassna silt loam, 0 to 2 percent slopes	C457A	2427	2798554	2q2y6	sd045	1973	1:20000
Bryant-Grassna silt loams, 0 to 2 percent slopes	C745A	105	2798586	2qyg3	sd045	1973	1:20000
Bryant-Grassna silt loams, 0 to 2 percent slopes	C745A	6230	2798651	2qyg3	sd049	1981	1:20000
Bryant-Grassna silt loams, 2 to 6 percent slopes	C745B	4600	2798676	2rsq9	sd049	1981	1:20000
Bryant-Grassna silt loams, 0 to 2 percent slopes	BrA	305	355169	cxl2	sd049	1981	1:20000
Bryant-Grassna silt loams, 2 to 6 percent slopes	BrB	123	355170	cxl3	sd049	1981	1:20000
Bryant-Grassna silt loams, 2 to 6 percent slopes	C745B	8000	2798775	2rsq9	sd089	1980	1:20000
Bryant-Grassna silt loams, 0 to 2 percent slopes	C745A	4651	2798753	2qyg3	sd089	1980	1:20000
Temvik-Grassna-Bearpaw complex, 0 to 6 percent slopes	C743B	3264	2798774	2rsq7	sd089	1980	1:20000
Grassna silt loam, 0 to 2 percent slopes	C457A	1747	2798701	2q2y6	sd089	1980	1:20000
Temvik-Grassna silt loams, 2 to 6 percent slopes	C742B	8	2798773	2rsq5	sd089	1980	1:20000
Temvik-Grassna silt loams, 2 to 6 percent slopes	C742B	44	2799481	2rsq5	sd107	1983	1:20000
Bryant-Grassna silt loams, 2 to 6 percent slopes	C745B	27	2799482	2rsq9	sd107	1983	1:20000
Grassna silt loam, 0 to 2 percent slopes	C457A	9	2799450	2q2y6	sd107	1983	1:20000
Grassna silt loam, 0 to 2 percent slopes	C457A	215	2800079	2q2y6	sd129	1975	1:20000
Temvik-Grassna silt loams, 2 to 6 percent slopes	C742B	113	2800143	2rsq5	sd129	1975	1:20000
Bryant-Grassna silt loams, 0 to 2 percent slopes	C745A	83	2800116	2qyg3	sd129	1975	1:20000

Map of Series Extent

Approximate geographic distribution of the GRASSNA 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).