Nitrogen Fixation, it's not just for Nitrogen poor systems : spatial and temporal patterns of N-fixation in the Upper Mississippi river ( UMR) Image Date Issued 2010 Author Bartsch, L. A. Klein, S. J. Franz, J. L Knights, B. C. Houser, J. H Decker, J. K. Richardson, W. B. Main Topic Water Conveyance & Hydraulics
