title: Comparisons of nitrogen fixation estimates in soybeans by nodule weight, leghemoglobin content, and acetylene reduction.
mesh_terms: D000114:Acetylene / Q000378:metabolism*; D002849:Chromatography, Gas; D003124:Colorimetry; D005030:Ethylenes / Q000096:biosynthesis; D009586:Nitrogen Fixation; D010084:Oxidation-Reduction; D010860:Pigments, Biological / Q000032:analysis / Q000378:metabolism*; D012231:Rhizobium / Q000378:metabolism*; D012621:Seasons; D013025:Glycine max / Q000032:analysis
chemical_list: D005030:Ethylenes; D010860:Pigments, Biological; D000114:Acetylene