Oxalate-extractable Al (g∙kg⁻¹)

Soil horizon

Mixed

Coniferous

Alder

FH

1.3 ± 0.4

1.2 ± 0.1

N/A

Bf₁

8.7 ± 1.7

4.0 ± 1.0

3.9 ± 0.9

Bf₂

8.0 ± 2.3

8.0 ± 0.1

2.8 ± 0.8

BC

6.8 ± 1.3

9.5 ± 0.3

N/A