Ecology 5th Edition by Manuel Molles

Exercise 20

What are the relative fluxes of nitrogen through fixation and denitrification on land and in the oceans (see fig. 19.3)?
Figure 19.3 The nitrogen cycle. Numbers represent storage or fluxes as 10 12 g N per year (data from Schlesinger 1991, after Söderlund and Rosswall 1982).