We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleOcean productivity before about 1.9 Gyr ago limited by phosphorus adsorption onto iron oxides.AuthorsBjerrum CJ; Canfield DEPublicationNature, 2002, Vol 417, Issue 6885, p159ISSN0028-0836Publication typearticleDOI10.1038/417159a