Deep soils found in forests may be less effective at storing carbon in the long term than previously assumed, potentially reducing the net climate benefits of tree planting, a University of Stirling professor has warned. Professor Jens-Arne Subke of the University's Faculty of Natural Sciences has co-authored a new commentary with Dr. Thomas Parker of the James Hutton Institute that builds on recent research led by Professor Subke that cautioned that the climate benefits of tree-planting could be overstated if soil carbon losses aren't included in calculations.