Treatment

Number of storage

root per plant

Weight of storage root per plant (kg)

Fresh storage root yield

(t∙ha−1)

Starch content

(%)

Harvest index

Planting method (M)

Vertical

10.7 a

6.1

60.6 a

28.1

0.74

Horizontal

8.9 b

5.3

54.3 b

27.8

0.77

Cultivar (C)

Rayong-7

10.3 a

6.7 a

67.4 a

28.5 ab

0.78 ab

Rayong-11

10.8 a

5.4 ab

54.6 ab

28.9 a

0.75 bc

Rayong-72

7.7 b

5.3 ab

49.7 b

26.4 b

0.81 a

Huaybong-80

10.1 ab

4.8 b

55.0 ab

29.4 a

0.70 c

E-dum

10.2 a

6.1 ab

60.4 ab

26.6 b

0.72 c

F-test

M

*

ns

*

ns

ns

C

*

*

*

*

**

M × C

ns

ns

ns

*

ns