Stemwood C sequestration rate did not differ significantly between broadleaved species and conifers. Broadleaved species sequestered C in stemwood biomass at a rate of 9.7 Mg C ha1 yr1 while conifers sequestered C in stemwood at 5.7 Mg C ha1 yr1. Total soil carbon was small in comparison to the C contained in the stemwood, equaling just 13% of broadleaf stemwood C and 16% of conifer stemwood C on average. Soil C became a decreasing proportion of the total above and belowground biomass and soil C budget with increasing age since conversion to forest plantation (Fig. 3). Neither annual stemwood production nor aboveground biomass of stemwood were significantly correlated with soil carbon (data not shown)