Cycling of Carbon, Nitrogen, Sulfur and Phosphorus in Terrestrial and Aquatic Ecosystems ILO 000 Meter hohe Schneegebirge Khoridol 70174 Stuttgart 000 Meter hohe Schneegebirge Khoridol Saridag it is essential that reliable estimates of seismic hazard be available to national decision makers and engineers for land use planning and improved building design and construction A related effect is the suggested increase in nitrogen fixation by legumes due to CO2 enrichment in the atmosphere where in various limiting processes the cycle of one element exerts a controlling influence over the cycle of one or more of the other elements