County-level Estimates for Carbon Distribution in U.S. Croplands, 1990-2005 - Legend
The following legend describes the spreadsheet headings in terms of carbon flux or distribution. Units for all values are Mg C yr-1. Megagram (Mg) = 106 gram
Legend
| NPP | — | Net primary productivity or net carbon uptake |
| AgB | — | Carbon in above-ground biomass |
| BgB | — | Carbon in below-ground biomass |
| Harvest | — | Carbon harvested and transported off site |
| Residue | — | Carbon remaining on the surface following harvest |
