Figure 4. Bagnouls-Gaussen diagrams of Feudozzo (A) and Argenta (B) truffle grounds.

Climate data span from September 2009 to December 2010 (A) and from September 2008 to December 2009 (B). Mean amounts of extra-radical soil mycelium of T. magnatum (µg g⁻¹ of dried soil) obtained from seasonal dynamic analyses are added as columns in correspondence of the respective sampling month to facilitate the comparison between climate and mycelial biomass data (error bars represent standard error). *  =  Fruiting season: from 3-Nov-2009 to 3-Dec-2009 (A) and from 27-Oct-2008 to 18-Nov-2008 (B).