TABLE 1.

Particle size distribution, pH, organic C, and exchangeable cations of the soil profiles of the native forest site of Breuil, France

Depth (cm)	pHa	% clay	% silt	% sand	CECb (cmolc kg−1)	BSc (%)
0-8	4.3	16.0	15.0	69.0	12.2	7.7
10-18	4.6	13.0	26.0	61.0	10.5	5
20-28	4.7	14.0	24.0	62.0	8.9	3.5

^aSoil pH was measured in H₂0 with a soil-to-solution ratio of 1:2.

^bCation exchange capacity (CEC) = Mg²⁺ + Ca²⁺ + Na⁺ + Fe³⁺ + Mn²⁺ + Ba²⁺ + H⁺ + Al. cmol_c, cmol of charge.

^cBase saturation (BS) = (Mg²⁺ + Ca²⁺ + Na⁺ + Fe³⁺ + Mn²⁺ + Ba²⁺)/CEC.