Table 1 Particle size distribution proportion of natural sand and hard sand.

From: Mallard hindlimbs locomotion system respond to changes in sandy ground hardness and slope

Particle size (mm)

Hard sand

Natural sand

Weight (g)

Proportion (%)

Weight (g)

Proportion (%)

> 0.355

0.22

0.02%

0.21

0.05%

0.250–0.355

0.92

0.09%

0.84

0.19%

0.180–0.250

40.00

4.05%

37.69

8.63%

0.150–0.180

534.00

54.11%

302.00

69.13%

0.125–0.150

200.00

20.27%

70.00

16.02%

0.090–0.125

185.50

18.80%

23.00

5.27%

0.075–0.090

0.62

0.06%

0.10

0.02%

< 0.075

25.69

2.60%

3.00

0.69%

Total

986.95

100.0%

436.84

100.0%