RM of Westbourne Bulletin 99-36 - Agriculture and Agri-Food Canada

Page 18 Information Bulletin 99-36 Rural Municipality of WestbourneIrrigation Suitability Map.Irrigation ratings are based on an assessment of the most limitingcombination of soil and landscape conditions. Soils in the sameclass have a similar relative suitability or degree of limitation forirrigation use, although the specific limiting factors may differ.These limiting factors are described by subclass symbols at detailedmap scales. The irrigation rating system does not consider wateravailability, method of application, water quality, or economics ofirrigated land use.Irrigation suitability is a four class rating system. Areas with no orslight soil and/or landscape limitations are rated Excellent to Goodand can be considered irrigable. Areas with moderate soil and/orlandscape limitations are rated as Fair and considered marginal forirrigation providing adequate management exists so that the soil andadjacent areas are not adversely affected by water application. Soiland landscape areas rated as Poor have severe limitations forirrigation.This generalized interpretive map is based on the dominant soilseries for each soil polygon, in combination with the dominant slopeclass. The nature of the subclass limitations and the classification ofsubdominant components is not shown at this generalized mapscale.Table 6. Irrigation Suitability 1Class Area Percent(ha)of RMExcellent 0 0.0Good 50446 38.5Fair 45573 34.8Poor 27841 21.3Organic 6297 4.8Unclassified 148 0.1Water 586 0.4Total 130891 100.01 Based on the dominant soil series and slope gradient within each polygon.