Although the Prairie Provinces region is named for the prairies located within Alberta, Saskatchewan and Manitoba, the physical geography of the three provinces is quite diverse, consisting of portions of the
Canadian Shield, the
Western Cordillera and the
Canadian Interior Plains. The plains comprise both prairies and
boreal plains forests while, with the exception of
freshwater along the
Hudson Bay, the shield is predominantly forested. Each has a unique geographic distribution and characteristic mix of plant species. All but a fraction of 1% of the tallgrass prairie has been converted to
cropland. What remains occurs on the plain centred in the
Red River Valley in Manitoba. Mixed prairie is more common and is part of the dry interior plains that extend from Canada south to the U.S. state of
Texas. (WWF terminology) shown here on a map of North America in green, is a type of true prairie (grassland) that occurs in the southern parts of the Prairie Provinces. More than half of the remaining native grassland in the Canadian Prairies is mixed. Though widespread in southern Saskatchewan and southeastern Alberta, because of extensive cattle grazing, it is estimated that only 24% of the original mixed prairie grassland remains. , delineating prairie soil types in the Prairie provinces The southwestern Canadian Prairies, supporting brown and
black soil types, are
semi-arid and highly prone to frequent and severe droughts. The zones around the cities of
Regina and immediately east of
Calgary are also very dry. Most heavy precipitation quickly dissipates by the time it passes
Cheadle on its way heading east. The areas around
Edmonton and
Saskatoon are especially notable as good farmland. Both lie in the northern area of the Palliser's Triangle, and are within
aspen parkland a transitional prairie ecozone. It lies north of the
55th parallel and is warm and dry enough to support extensive farming.
Aspen parkland covers the area; The long daylight hours in this region during the summer are an asset despite having an even shorter growing season than central Alberta. In fact, agriculture plays a major economic role in the Peace Region. == Demographics ==