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Table 3 SOC and N stocks (Mg ha–1) at different soil depths in the secondary forest, the organic tea plantation, and the conventional tea plantation

From: Changes in soil organic carbon and nitrogen stocks in organic farming practice and abandoned tea plantation

Depth (cm)

SOC Stock (Mg C ha–1)

Second

Forest

Org. TP

Conv. TP

0–10

59.42(1.61)a

27.36 (3.08)c

37.16 (3.49)b

10–30

30.17 (4.96)b

40.63 (1.43)a

35.60 (3.65)ab

30–50

25.94 (4.13)a

29.48 (3.18)a

19.35 (1.85)b

Total

115.53 (7.23)a

97.47 (1.53)b

92.1 (8.54)b

Depth (cm)

     N Stock (Mg N ha–1)

Second

Forest

Org. TP

Conv. TP

0–10

4.55 (0.25)a

2.57 (0.45)c

3.70 (0.38)b

10–30

2.88 (0.29)b

4.16 (0.27)a

3.83 (0.49)a

30–50

2.70 (0.27)a

2.97 (0.29)a

2.54 (0.25)a

Total

10.12 (0.56)a

9.70 (0.19)a

10.06 (1.01)a

  1. Second. Forest: Secondary Forest; Org. TP: Organic Tea Plantation; Conv. TP: Conventional Tea Plantation
  2. Different letters in the same soil layer indicate significant differences among different land-use types at P < 0.05 (n = 3)