Cole, C.V.Burke, I.C.Parton, W.J.Schimel, D.S.Ojima, D.S.Stewart, J.W.B.2018-09-202018-09-201989-02-16http://hdl.handle.net/10388/10739enAttribution-NonCommercial-NoDerivs 2.5 CanadaAnalysis of historical changes in soil fertility and organic matter levels of the North American Great PlainsPresentation