Soil Data Explorer - HOWLAND

Official Series Description

Lab Data Summary

Aggregate lab data for the HOWLAND soil series. This aggregation is based on all pedons with a current taxon name of HOWLAND, 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 HOWLAND 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
143	83P0338	82NH007003	Howland	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	44.9749985,-71.3916702
144B	40A0486	S1962NH009004	HOWLAND	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	44.2230568,-71.851387
n/a	97P0227	S1996NH007009	Howland	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	n/a

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the HOWLAND 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 HOWLAND 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 HOWLAND 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 HOWLAND 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.

Competing Series

Soil series competing with HOWLAND 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 HOWLAND 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 HOWLAND 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 HOWLAND, 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 HOWLAND 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
Howland gravelly loam, 3 to 8 percent slopes	HoB	125264	301833	2w3y6	me607	1960	1:20000
Howland loam, 0 to 8 percent slopes, very stony	HvB	97885	301835	2w3y8	me607	1960	1:20000
Plaisted-Howland association, 0 to 8 percent slopes, very stony	PvB	36921	301870	2w3yr	me607	1960	1:20000
Plaisted-Howland association, 8 to 15 percent slopes, very stony	PvC	36089	301871	2w3yq	me607	1960	1:20000
Howland gravelly loam, 8 to 15 percent slopes	HoC	16101	301834	2w3y7	me607	1960	1:20000
Thorndike-Howland association, 8 to 15 percent slopes, very rocky	TsC	14461	301894	2wqmh	me607	1960	1:20000
Howland silt loam, 8 to 15 percent slopes, very stony	HvC	8358	301836	2w3y9	me607	1960	1:20000
Thorndike-Howland association, 0 to 8 percent slopes, very rocky	TsB	6217	301893	2wqmc	me607	1960	1:20000
Howland gravelly loam, 0 to 3 percent slopes	HoA	899	301832	2t0k3	me607	1960	1:20000
Howland loam, 0 to 8 percent slopes, very stony	HvB	75236	614173	2w3y8	me608	1962	1:20000
Howland gravelly loam, 3 to 8 percent slopes	HoB	68352	614171	2w3y6	me608	1962	1:20000
Plaisted-Howland association, 0 to 8 percent slopes, very stony	PvB	67046	614203	2w3yr	me608	1962	1:20000
Plaisted-Howland association, 8 to 15 percent slopes, very stony	PvC	37110	614204	2w3yq	me608	1962	1:20000
Thorndike-Howland association, 0 to 8 percent slopes, very rocky	TsB	24358	614217	2wqmc	me608	1962	1:20000
Thorndike-Howland association, 8 to 15 percent slopes, very rocky	TsC	23329	614218	2wqmh	me608	1962	1:20000
Howland silt loam, 8 to 15 percent slopes, very stony	HvC	13281	614174	2w3y9	me608	1962	1:20000
Howland gravelly loam, 8 to 15 percent slopes	HoC	5816	614172	2w3y7	me608	1962	1:20000
Howland gravelly loam, 0 to 3 percent slopes	HoA	2378	614170	2t0k3	me608	1962	1:20000
Howland loam, 0 to 8 percent slopes, very stony	HvB	106569	285223	2w3y8	me614	1960	1:20000
Howland silt loam, 8 to 15 percent slopes, very stony	HvC	26989	285224	2w3y9	me614	1960	1:20000
Howland silt loam, 15 to 30 percent slopes, very stony	HvD	3275	285225	2w3yb	me614	1960	1:20000
Howland gravelly loam, 3 to 8 percent slopes	HoB	2688	285221	2w3y6	me614	1960	1:20000
Howland gravelly loam, 8 to 15 percent slopes	HoC	179	285222	2w3y7	me614	1960	1:20000
Plaisted-Howland-Penquis association, 3 to 15 percent slopes, very stony	PWC	51419	285351	2t0k9	me615	1994	1:24000
Howland-Monarda association, 0 to 8 percent slopes, very stony	HRB	47340	285332	2w3zf	me615	1994	1:24000
Monarda-Howland-Thorndike complex, 3 to 15 percent slopes, very stony	MXB	20639	285344	2w3zn	me615	1994	1:24000
Plaisted-Penquis-Howland association, 15 to 25 percent slopes, very stony	PWD	3067	285352	2w407	me615	1994	1:24000
Howland gravelly loam, 3 to 8 percent slopes	HoB	3052	285333	2w3y6	me615	1994	1:24000
Cabot-Howland association, 0 to 15 percent slopes	CAB	829	1478426	1lmf5	me619	2005	1:24000
Howland-Plaisted association, 15 to 35 percent slopes, very stony	HYD	278	1478424	2w3yc	me619	2005	1:24000
Howland-Cabot association, 0 to 15 percent slopes	HWB	248	1478425	1lmf4	me619	2005	1:24000
Plaisted-Howland association, 3 to 15 percent slopes, very stony	PSB	19	1478417	2w3yp	me619	2005	1:24000
Plaisted-Howland association, 15 to 35 percent slopes, very stony	PSD	4	1478418	2w3yn	me619	2005	1:24000
Howland-Cabot association, gently sloping, very stony	964B	31500	280760	9f4s	nh607	2000	1:24000
Cabot-Howland association, gently sloping, very stony	965B	23124	280761	9f4t	nh607	2000	1:24000
Howland-Plaisted association, 15 to 35 percent slopes, very stony	864D	14285	280653	2w3yc	nh607	2000	1:24000
Howland silt loam, 8 to 15 percent slopes, very stony	567C	9635	280500	2w3y9	nh607	2000	1:24000
Plaisted-Howland association, 15 to 35 percent slopes, very stony	762D	8249	280598	2w3yn	nh607	2000	1:24000
Plaisted-Howland association, 3 to 15 percent slopes, very stony	762B	7518	280597	2w3yp	nh607	2000	1:24000
Howland silt loam, 15 to 30 percent slopes, very stony	567D	5065	280501	2w3yb	nh607	2000	1:24000
Howland loam, 0 to 8 percent slopes, very stony	567B	3545	280499	2w3y8	nh607	2000	1:24000
Howland gravelly loam, 8 to 15 percent slopes	566C	1709	280497	2w3y7	nh607	2000	1:24000
Howland gravelly loam, 3 to 8 percent slopes	566B	1166	280496	2w3y6	nh607	2000	1:24000
Howland silt loam, 15 to 25 percent slopes	566D	429	280498	2w3zg	nh607	2000	1:24000

Map of Series Extent

Approximate geographic distribution of the HOWLAND 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).