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NSI features
 The National Soil Inventory
(NSI) features data is a spatial, point dataset with 6127 points, located
in a 5km grid across England and Wales.
NSI features derives many parameters beneficial for modelling soils. These
parameters, derived from readings and measurements taken at the NSI site
include the depth from the surface to various layers, as well as providing
information on the amount of risk that is posed to this soil by erosion
and flooding. This dataset will prove important for those wanting a good
understanding of the depths of the various layers in the soil profile,
and those interested in mapping risks.
NSI features was used in the creation of the ADAS/DEFRA Agricultural Land
Classification (A.L.C.).
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NSI features data and description
The table below describes the various properties within this data product.
Each point contains the information outlined below.
| Property |
Example from data |
Description |
| EAST_NSI |
|
National Grid reference easting at 5km resolution with 1km offset
from true grid |
| NORTH_NSI |
|
National Grid reference northing at 5km resolution with 1km offset
from true grid |
| DTOP |
|
Depth (cm) of topsoil |
| DGLEY |
|
Depth to gleyed horizon (cm). 999 implies NO gleyed horizon present. |
| DSGLEY |
|
Depth to slightly gleyed horizon (cm). 999 implies no slightly gleyed
horizon |
| DSKL |
|
Depth (cm) to skeletal horizon. 999 implies NO skeletal horizon |
| DROCK |
|
Depth (cm) to rock. 999 implies no rock |
| DSPL |
|
Depth (cm) to slowly permeable layer, ie in which effectively there
is no downward percolation of water. 999 implies NO slowly permeable
layer |
| CALCAREOUS_TOPSOIL |
|
Yes / No, indicating if the topsoil is calcareous or not (Y= Greater
than 1% CaCO3) |
| ORGANIC_TOPSOIL |
|
Indicates Carbon >12% in the top 25cm |
| DISTURBED |
|
Soil disturbed indicator (Y/N) |
| EROSION_RISK |
|
Indication of the erosion risk: Y (erosion risk), N (no risk), I
(indeterminate) |
| FLOOD_RISK |
|
Susceptibility to flooding indicator Y/N |
| MARINE_ALLUVIUM |
|
Marine alluvium indication: possible (Y), not possible (N) or could
be possible (M) |
|
