Growing media

Compositions

Number of minitubers initiated

D1

0.25% NPK

5.0 ± 0.0a

D2

0.5% NPK

3.3 ± 0.3ab

D3

0.75% NPK

4.0 ± 1.1a

Control

water

0.0 ± 0.0b

P-value

0.01