Fig. 5
From: Future nitrogen availability and its effect on carbon sequestration in Northern Eurasia
Influence of N fertilizer applications on temporal trends in C and N fluxes during forest regrowth on abandoned land that was covered by croplands during the year 2000. a Annual net N mineralization (NetNMin). b Annual C sequestration/loss as represented by net ecosystem carbon balance (NECB). c Annual net primary production (NPP). d Annual heterotrophic respiration (RH). e Accumulation of new-carbon sequestered by forest vegetation (VegCNEW). f Accumulation/loss of new-carbon sequestered into forest soil organic matter (TotSOCNEW). g Accumulation of old-soil organic carbon stocks (TotSOCOLD) as croplands are abandoned to forests. h Accumulation of old-soil organic nitrogen stocks (TotSONOLD) as croplands are abandoned to forests. Simulations include abandoned croplands where crops are never fertilized (unfertilized crops), crops are fertilized between years 1950 and 2000 (pre-2001 fertilized crops), and crops are fertilized between years 1950 and 2100 (fertilized crops)
