"The number of canola varieties released, since the enactment of Plant Breeders' Rights (PBR) legislation in Canada in 1990, has increased substantively. The effect of genetic enhancements, including PBR, on canola yield and its variance is estimated for canola production regions of Manitoba...

"A spatial model of intensive livestock production for a region in southern Alberta was used to evaluate the impact of economic factors and regulation on regional returns and optimal manure management. Under current conditions, profit maximizing application of manure met nitrogen requirements...