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Layer: Soil Irrigation Suitability (ID: 3)

Name: Soil Irrigation Suitability

Display Field: Suitability

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The UAESIS survey produced besides soil mapping and classification an evaluation of the soil’s suitability for development of irrigated agriculture.The evaluation used follows the land suitability classification concepts developed by the FAO in its Framework for Land Evaluation (FAO 1976). The FAO system is generally considered as a benchmark for land evaluation. The FAO system has been used as the basis for specific land evaluation applications such as irrigated agriculture (FAO 1985).The soil characteristics associated with the various ratings can be summarized as follows:- S1 - land that is highly suitable for irrigated agriculture. The soil is capable of producing sustained high yields for a wide variety of climatically adapted crops. The soils are nearly level and well drained. They are deep, fine sandy textured or finer, single grained thereby allowing for easy root penetration and retention of abundant air and water in the root zone. The soils have low soluble salts, sodicity, gypsum content, calcium carbonate content and a neutral pH. Soils selected in this category in Abu Dhabi are lighter textured and contain more gravel and carbonate than might be considered highly suitable in other locations, however these criteria are appropriate for the range of soils available in the Emirate.- S2 - land of moderate suitability for irrigated agriculture. The soils are inherently lower in productive capacity than soils ranked S1. Soil and land qualities may impose restrictions on irrigation; however these restrictions may be relatively easily corrected or compensated for. S2 soils in Abu Dhabi have sandy texture, and are single grain or massive. They are deep and somewhat excessively or well drained. The soils are typically very slightly saline, non-sodic, have low gypsum content, and can have a hummocky microrelief. These moderate restrictions may be overcome with appropriate management strategies.- S3 - land of marginal suitability for irrigated agriculture. The productive capacity of S3 is less than S1 and S2 soils. The soils have severe limitations that may be corrected with appropriate management strategies. S3 soils in Abu Dhabi are moderately deep with a hard pan or water table occurring within 100-150 cm of the soil surface. They have sand to sandy loam textures and are single-grained or massive. They are typically slightly saline to saline and have moderate gypsum contents. These soils may have moderately steep gradient (up to 32%) with moderately high relief (up to 9 meters). - N1 - land that is currently unsuitable for irrigated agriculture. Such soils in Abu Dhabi typically have shallow rooting depths with hardpans within 50 – 100 cm of the soil surface, high gypsum content close to the surface, are saline or have high relief (up to 30 m) and steep gradient (up to 56%).- N2 - land considered to be permanently unsuitable for irrigated agriculture. This category includes soils which are very shallow, occur with rock outcrops, on very steeply sloping land (over 56%), having very high relief (over 30 m), are very poorly drained and strongly saline or have shallow depth to gypsum. Under conventional economic conditions these soils do not warrant further investigation for irrigation purposes.Field Description:- OBJECTID: A unique, not null integer field used to uniquely identify rows in tables in a geodatabase- Shape: Field which shows the stored geometry type created through ArcGIS (Point, Line, Polygon, Multipoint or Multipatch)- Suitability: Soil Irrigation Suitability Rating- Restriction1: Primary Restriction- Shape_Length: Represents the total length of a polygon's perimeter, in the units used by the feature class' coordinate system- Shape_Area: Represents the total area of a polygon, in square units of the linear distance unit used by the feature class' coordinate system- RuleID: Needed for labeling purposes in represantations- Override: A BLOB field that stores feature-specific override to the representation rules- RuleID_1: Needed for labeling purposes in represantations- Override_1: A BLOB field that stores feature-specific override to the representation rulesProcessing Steps(DCI 2017/18): Each of the Soil Classes (subgroup and phase level) of the EAD Well Inventory and Soil Salinity Mapping Project were assigned an Irrigation Suitability and the corresponding restrictions as described above. Classes with the same Suitability and Primary Restriction were merged.Data Quality: Data was QS controlled

Copyright Text: Source Agency: EAD (2008) and DCI (2017/18) Collection Agency: EAD and DCI Maintenance Agency: EAD Custodial Agency: EAD Contact: EAD - Environment Information, Science & Outreach Management (EISOM)

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Supported Query Formats: JSON, geoJSON

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Type ID Field: null

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