npzd.h
#if defined O_npzd_nitrogen
#else
#endif
# if defined O_benthic_denitrification
# if defined O_benthic_denitrification_add
# endif
# endif
#  if defined O_benthic_P_release || O_P_weathering
# endif
# if defined O_BURP_diagnostic
# endif
# if defined O_npzd_fe_limitation
# endif
#if defined O_save_npzd
# if defined O_npzd_nitrogen
# if defined O_benthic_denitrification
# if defined O_benthic_denitrification_add
# endif
# endif
# if defined O_benthic_P_release
#  if defined O_C_burial_diagnostic
#  endif
# endif
#  if defined O_RRPOC_diagnostic
#  endif
#  if defined O_BURP_diagnostic
#  endif
# if defined O_npzd_extra_diagnostics
#endif
#endif
# if defined O_ocean_upwelling_pipes
# if defined O_ocean_upwelling_pipes_with_fe
# endif
# endif
#endif