Earthworms and plant growth
The hypothesis that the presence of earthworms in soil will help plants to grow faster is proven to be truecorrect.
The presence of earthworms is very important for a healthy garden. The manure produced by earthworms increases the nutritional content of the soil. The burrowing activity of the worms helps to aerate the soil, allowing better air flow and rain water absorption by the soil. They also help to redistribute nutrients to different layers of the soil. Earthworms are an integral part of the eco-system in our gardens.
What would happen if the experiment was repeated using other types of seeds like corn or sunflower?
The experiment can be repeated by varying the amounts of moisture in the soil by watering and not watering some plant.
How do earthworms affect plant growth - http://www.ehow.com/how-does_5133420_do-earthworms-affect-plant-growth.html
Earthworm soil conditioner: improve your soil - http://www.essortment.com/all/earthwormssoil_rmkf.htm