The influence of ammonium nitrate on the fine structure of nodules of Medicago tribuloides Desr. and Trifolium subterraneum L.
D066298:In Vitro Techniques; D008854:Microscopy, Electron; D009586:Nitrogen Fixation; D059828:Plant Cells; D010944:Plants / Q000187:drug effects*; D000644:Quaternary Ammonium Compounds; D012231:Rhizobium / Q000166:cytology
D000644:Quaternary Ammonium Compounds