Table 1 Soil pH change along rotations from the end of the first 7-year-rotation (R1Y7), to year 2 of the second rotation (R2Y2) and 5 of the second rotation (R2Y5)

pH-H₂O

4.2 (± 0.03) c

4.4 (± 0.02) b

4.5 (± 0.04) a

4.4 (± 0.02) a

4.3 (± 0.03) a

4.4 (± 0.03) a

3.9 (± 0.05) b

4.0 (± 0.03) b

4.2 (± 0.04) a

pH-KCl

3.5 (± 0.02) a

3.5 (± 0.02) a

3.5 (± 0.03) a

3.3 (± 0.02) a

3.2 (± 0.02) b

3.3 (± 0.03) a

3.5 (± 0.02) a

3.5 (± 0.02) a

3.5 (± 0.04) a

Delta pH (∆pH)

0.8 (± 0.03) c

0.9 (± 0.01) b

1.0 (± 0.02) a

1.1 (± 0.02) a

1.1 (± 0.02) b

1.1 (± 0.03) a

0.4 (± 0.06) ab

0.5 (± 0.03) b

0.6 (± 0.05) a