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Fig. 1 | Annals of Forest Science

Fig. 1

From: Exceedance of critical loads and of critical limits impacts tree nutrition across Europe

Fig. 1

Number of plots with exceedance of the critical limits for Al toxicity (Bc/Al < 1) and N saturation (Nmin > 1 mg L−1) in none (fss = 0 %), a minority (fss > 0 to 50 %) and a majority (fss >50 %) of the soil solution samples from lysimeters in 0- to 40-cm depth and the deepest lysimeters, respectively. Number of plots (displayed as bars) and percentages of plots (displayed as arc length of the pie graphs disks) were compiled for groups of plots with and without exceedance of SSMB critical loads for acidity, exceedance of SSMB critical loads for N deposition and throughfall N deposition exceeding TFN = 15 kg ha−1 year−1 (TFN > 15) based on a mean of the available annual values of the period 2006 to 2009

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Annals of Forest Science

ISSN: 1297-966X