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Table 1 Carbon and nitrogen pools and fluxes used for a C4 crop parameterization

From: Biofuels, cropland expansion, and the extensive margin

Variable Valuesa for C4 Source and comments
Cv 649 Evrendilek [28]
Nv 9.9 Evrendilek [28]
Cs 3071.5 Evrendilek [28]
Ns 307.1 Evrendilek [28]
Nav 2.64 Based on 0.86%, the mean Nav/Ns ratio
GPP 649 Evrendilek [28]
NPP 296.6 Evrendilek [28]
NPPSAT 296.6 Evrendilek [28]
NUPTAKE 3.98 Calculated from NPP n , 75% NPP n  = NUPTAKE
  1. aUnits for annual gross primary production (GPP), net primary production (NPP), and NPPSAT are in grams of carbon per square meter per year (g C m−2 year−1). Units for vegetation C (Cv) and soil C (Cs) are in grams of carbon per square meter (g C m−2). Units for vegetation N (Nv), soil N (Ns), and inorganic N (Nav) are grams of nitrogen per square meter (g N m−2) Units for annual N uptake by vegetation (NUPTAKE) are in grams of nitrogen per square meter per year (g N m−2 year−1).