Design an experiment to demonstrate hydrotropism.

Experiment to demonstrate hydrotropism: Growth movements in response to the stimulus of moisture (water) are termed as hydrotropic movements (Hydrotropism).
Experiment: Place some ready to germinate seeds of pea/gram/beam in moist sawdust in a shallow box whose bottom has been replace by a wire gauze.
Keep the appratus undisturbed for 2-3 days. Keep the sawdust moist.

Fig. Experiment to demonstrate hydrotropism
After sometime radicles will pass through the sieves. Then the radicles curve upward again to enter into the moist sawdust. The root are positively hydrotropic and the curvature more then that due to geotropic effect.