Table 3.

Screening of raw data.

Chapter serial number	Data selecting	Contain sample plots	Cause
3.1	We selected the ecological corridor from the river distance > 10 m sampling points, an ecological corridor outside the scope of cultivated land (in Harbin’s typical mollisols zone, from the Ash River > 300 m).	C, D, E	Few natural factors affect the quality of mollisols when the sampling points with a distance > 10 m are affected by uncontrollable factors such as river erosion
3.2 Figure 3	We selected the recovery time as relatively particular (30-35years), different distance data (distance > 10m).	D, E	Control variables to improve experimental accuracy
3.2 Figure 4	We selected a relatively certain distance (distance 70 m-100 m) and different recovery time data.	D, E	Control variables to improve experimental accuracy
3.3 Figure 5	We selected samples (10m < distance < 300m) of cultivated land and forest affected by ecological corridors.	A, B, D, E	Comprehensive analysis of the influence of ecological corridor construction factors on soil within the scope of influence
3.3 Figure 6	We selected samples from stable ecological corridors (Distance from the Ash River > 30 m, recovery time > 5 years)	D, E	Control variables to improve experimental accuracy
3.4 Figure 7	We select the samples in the ecological corridor that were stable and affected by the ecological corridor distance (distance from the ecological corridor > 30 m, 35 a ≥ recovery time ≥ 20 a)	D, E	Control variables to improve experimental accuracy
3.4 Figure 8	We selected samples (100m ≥ Distance from Ash River ≥ 45m, recovery time > 3 years) which were affected by the recovery time of the ecological corridor.	D, E	Control variables to improve experimental accuracy
3.5	We limit the distance between the sampling points and the Ash River (30-80m). In addition, we introduced cultivated land samples outside the ecological corridor (distance > 300 m) and continuously cultivated.	C, D, E	Control variables to improve experimental accuracy Plot C is introduced to simulate the restoration of cultivated land in 0 years to make the time series more coherent.