Map 3.1
Residual soil nitrogen on agricultural land, 2011 Map 3.1
Residual soil nitrogen on agricultural land, 2011

The title of this map is “Residual soil nitrogen on agricultural land, 2011.” On this map, each colour represents a range of residual soil nitrogen (RSN) values, in kilograms per hectare of agricultural land, grouped into one of five risk classes. The Category 1 (red) is greater than or equal to 40 kg/ha and indicates a very high amount of residual nitrogen in agricultural soil, Category 2 (orange) is 30 to less than 40 kg/ha and indicates a high amount of residual nitrogen in agricultural soil, Category 3 (yellow) is 20 to less than 30 kg/ha and indicates a moderate amount of residual nitrogen in agricultural soil, Category 4 (light green) is 10 to less than 20 kg/ha and indicates a low amount of residual nitrogen in agricultural soil, Category 5 (dark green) is less than 10 kg/ha and indicates a very low amount of residual nitrogen in agricultural soil while Category 6 (white) represents regions where there is no data.

Some of the highest values of residual soil nitrogen^{Note 1} in agricultural soils in 2011 occurred in areas that have historically had intensive agriculture, including parts of the Fraser–Lower Mainland, South Saskatchewan, Assiniboine–Red, Great Lakes, St. Lawrence and Maritime Coastal drainage regions.

On this map, a dark grey line represents drainage regions boundaries while a lighter grey line defines provincial and international boundaries. The locations and names of some major cities in each province are included. Water is pale blue.

Notes: The land use map is derived from remote sensing data products and administrative data sources. Water yield data were derived from discharge values contained in Environment and Climate Change Canada’s HYDAT database. Additional information is available in Appendix E.

Sources: Statistics Canada, Environment, Energy and Transportation Statistics Division, 2017, special tabulation from Agriculture and Agri-Food Canada, 2015, Land Use, 2010, (accessed September 16, 2015); Natural Resources Canada, 2009, Land cover, Circa 2000 - Vector, Earth Sciences Sector, Environment and Climate Change Canada , 2015, Water Survey of Canada, Archived Hydrometric Data Online, (accessed December 3, 2015); Statistics Canada, 2010, “Introducing a new concept and methodology for delineating settlement boundaries: A research project on Canadian settlements,” Environment Accounts and Statistics Analytical and Technical Paper Series, Catalogue no. 16-001-M, no. 11; and special tabulations by Statistics Canada, Business Survey Methodology Division to calculate the smoothed trends.

Notes