Photosynthesis represents the critical link between the biogeochemical cycles most important for humans and the functioning of the Earth system. The simplified form of this crucial reaction of photosynthesis is
6H2O + 6CO2 + Light energy (C6H12O6 + 6O2
It is vital to note that photosynthesis must be sustained by a consistent supply of mineral nutrients (Silverstein, 2007). Thus, in addition to linking biogeochemical cycles, of carbon (C), oxygen (O), and hydrogen (H), photosynthesis causes the biogeochemical cycling of mineral nutrients also play key roles in the functioning of the Earth system. Of these mineral nutrients, nitrogen (N) is ...