Table 1. Soil properties at the beginning of the experiment.

Depth (cm)	0–23	23–40	40–70	70–120
pH (1∶2.5)	8.16	8.06	8.02	7.84
Organic Matter (g kg−1)	31.8	29.2	21.9	22.3
CO3 (g CO3 2− kg−1)	198.0	201.3	159.0	181.0
Sand (g kg−1)	260	250	250	250
Silt (g kg−1)	490	510	520	460
Clay (g kg−1)	250	240	230	290