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In soils from black spruce ( Picea mariana [Mill.] B.S.P.) communities, low organic matter quality (e.g. low %N, high C:N, high lignin, high lignin:N, low pH, low extractable

Tillage is well known to enhance the mineralization of carbon and nitrogen in organic matter in the soil by exposing previously unexposed soil surfaces to oxy- gen and microbes and