Table 1.

Physical and chemical properties of the basal soil (0–20 cm, n = 1050–1350) in south, central and north Jiangsu.

Location	Organic matter (g kg−1)	Total N (g kg−1)	Olsen-P (mg kg−1)	NH4OAC-K (mg kg−1)	pH (H2O)
South	24.73 a	1.61 a	12.95 b	89.51 c	6.54 b
Central	24.66 a	1.52 b	15.74 a	109.15 b	7.46 a
North	21.65 b	1.15 c	15.18 a	141.11 a	7.39 a