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Table 3 Mean (± standard error; n = 15) biomass (Mg ha−1), biomass carbon, soil carbon (SOC), and total carbon (total biomass plus SOC 0–60 cm) carbon stocks (Mg C ha−1) for each of the five altitudinal gradient class and results of one-way ANOVA (at α = 0.05, significant differences between altitudinal gradient for any of the C stocks were indicated)

From: Carbon stock potential of scattered trees on farmland along an altitudinal gradient in Tigray, Northern Ethiopia

Biomass and carbon pools Altitude (m a.s.l)
2500–3000 2000–2500 1500–2000 1000–1500 500–1000 Mean Pr (> F)
AGBa 35.93 (7.9)a 7.77 (1.7)b 17.65 (3.4)ab 8.53 (1.2)b 9.10 (0.9)b 15.80 ***
BGBb 13.07 (2.7)a 3.19 (0.6)b 6.79 (1.2)ab 3.51 (0.4)b 3.75 (0.3)b 6.06 ***
AGC 17.97 (3.9)a 3.89 (0.8)b 8.82 (1.7)ab 4.26 (0.6)b 4.55 (0.5)b 7.90 ***
BGC 6.53 (1.08)a 1.59 (0.23)b 3.39 (0.46)ab 1.76 (0.16)b 1.87 (0.12)b 3.03 ***
SOCc 0–60 cm 23.09(1.82)a 21.53(1.72)a 22.55(2.40)a 10.91(0.85)b 22.28(0.83)a 20.07 ***
Total carbon 47.59 (4.77)a 27.01(2.49)bc 34.76(3.75)b 16.93(1.16)c 28.71(1.83)bc 31.00 ***
  1. aTrees and shrubs
  2. bStumps, coarse roots, and fine root
  3. cDead and decay organic matter