Table 1 Change in SOC stock (tonnes C ha⁻¹ yr⁻¹) and 95% confidence intervals (in parentheses) over 20 years for different climates and edaphic (i.e., soil texture) conditions.

Temperature Regime	Moisture Regime	Soil Texture	Depth with Significant Differences in SOC (cm)	Delta SOC (tonnes C ha⁻¹ yr⁻¹)
Cool	Dry	Loamy, Silty, and Clayey	5	0.06 (−0.08, 0.18)
Cool	Dry	Sandy	40	0.15 (−0.15, 0.44)
Cool	Moist	Loamy, Silty, and Clayey	10	0.27 (0.00, 0.56)
Cool	Moist	Sandy	40	0.35 (0.05, 0.65)
Warm	Dry	Loamy, Silty, and Clayey	70	0.21 (−0.15, 0.52)
Warm	Dry	Sandy	40	0.18 (−0.10, 0.46)
Warm	Moist	Loamy, Silty, and Clayey	60	0.33 (0.03, 0.61)
Warm	Moist	Sandy	35	0.50 (0.24, 0.76)
Tropical	Dry	Loamy, Silty, and Clayey	65	0.34 (−0.19, 0.85)
Tropical	Dry	Sandy	5	0.39 (0.18, 0.60)
Tropical	Moist/Wet	Loamy, Silty, and Clayey	65	0.54 (0.04, 1.02)
Tropical	Moist/Wet	Sandy	10	0.35 (0.13, 0.55)

The depth with significant differences in SOC stocks is the deepest depth in the profile with a change in SOC stock that does not include 0 (See Figure 1 for differences in SOC between management practices from 0 to 80 cm). The Delta SOC estimate is based on a minimum depth of 30 cm, but includes differences in SOC to deeper depths if the depth with significant differences was greater than 30 cm (See Figure 1 for differences in SOC between management practices at depths from 0 to 80 cm). Loamy, silty and clayey soils were adjusted for mass equivalency.

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