Field size (cm²)

This study

Shende et al. [19] *

Masanga et al. [20] *

Cone diameter (mm)

This study

0.6 × 0.6

0.5722

Not available

0.5690

4

0.5018

1 × 1

0.7162

Not available

0.7250

5

0.5705

2 × 2

0.8114

Not available

0.8070

7.5

0.6671

3 × 3

0.8434

0.8474

0.8440

10

0.7186

4 × 4

0.8766

0.8799

0.8800

12.5

0.7534

5 × 5

0.9062

0.9068

Not available

15

0.7799

6 × 6

0.9310

0.9314

Not available

17.5

0.7971

8 × 8

0.9708

0.9699

Not available

10 × 10

1.0000

1.0000

1.0000

15 × 15

1.0495

1.0496

Not available

20 × 20

1.0805

1.0829

Not available

30 × 30

1.1142

1.1184

Not available

40 × 40

1.1252

1.1312

Not available