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. 2020 Jul 2;8:e9456. doi: 10.7717/peerj.9456

Table 2. Paired t test values for effect on soil texture (clay, silt, sand) between vegetation restoration type and the control.

Set Soil texture 0–30 cm 0–10 cm 10–20 cm 20–30 cm
NS–CK1 Clay
Silt
Sand
EF–CK2 Clay
Silt + ++ +
Sand +
PF–CK3 Clay
Silt
Sand
ZF–CK4 Clay −−
Silt ++ + + +
Sand ++ + +
JC–CK5 Clay −− −−
Silt −− −−
Sand ++ ++ +
TG–CK6 Clay
Silt
Sand

Note:

++ or −−: Difference is significant at P < 0.01 level in double-tailed t test. +or : Difference is significant at P < 0.05 level in double-tailed t test. + indicates a significant increase and indicates a significant decrease, empty shows no significant change. NS, natural shrubland; EF, Eucalyptus robusta economic forest; PF, Prunus salicina economic forest; ZF, Zenia insignis economic forest; JC, Juglans regia-crop mixed forest; TG, Toona sinensis-Pennisetum purpureum mixed forest. n = 3 in every soil layer, n = 9 in total soil layer (0–30 cm) for 6 restoration types except for EF, which n = 4 in every soil layer and n = 12 in total soil layer (0–30 cm). The same below.