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The horizon thickness was then multiplied by the available water content (mm) and summed for the entire soil profile to 1 m or rock if <1m. The map shows the average available water capacity calculated using the areal proportions of all soils in each 1:250 000 soil map unit.", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 27700, "latestWkid": 27700 }, "copyrightText": "Gagkas, Z., Lilly, A., Baggaley, N. & Donnelly, D. (2019). Map of available water capacity of soils in Scotland. James Hutton Institute. 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