| soil microbial populations, community composition, and activity as affected by repeated applications of hog and cattle manure in eastern saskatchewan. | a field site near humboldt, saskatchewan, was annually treated with hog or cattle manure and cropped to canola, spring wheat, barley, and canola from 1997 to 2000. during each growing season, soil was analyzed for microbial populations in terms of activity and community structure, and crops were assessed for root rot and foliar diseases. microbial activity in soils treated with cattle manure was higher than in soils treated with hog manure or urea. similarly, nitrous oxide emissions from soil in ... | 2003 | 14608420 |