Issue Date: December 15, 2008
Molybdenum Limits Nitrogen Fixation
Biogeochemists have discovered that molybdenum, not phosphorus as previously thought, is the limiting nutrient that dictates the rate of bacterial nitrogen fixation in tropical soils (Nat. Geoscience, DOI: 10.1038/ngeo366). The finding is an important development for the study of global biogeochemical cycles, the scientists say, because molybdenum-limited nitrogen fixation could constrain plant growth and hence carbon dioxide uptake by plants, a major sink for atmospheric CO2 in the tropics. Nitrogen fixation is the biological conversion . . .
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