Table 4 PBD.

From: Calibration of contact parameters of sandy soil for planting tiger nut based on non-linear tools

Symbol

Factor

Level

− 1

1

A

Sandy soil-sandy soil restitution coefficient

0.3

0.6

B

Sandy soil-sandy soil static friction coefficient

0.4

0.8

C

Sandy soil-sandy soil rolling friction coefficient

0.1

0.3

D

Sandy soil-steel plate restitution coefficient

0.3

0.6

E

Sandy soil-steel plate static friction coefficient

0.2

0.4

F

Sandy soil-steel plate rolling friction coefficient

0.2

0.4

G ~ L

Dummy parameter

–

–