Soil fertility and ants
The hypothesis that the presence of ants in the soil will help plants to grow faster is proven to be true.
Ants help to fertilize the soil in many ways. They help in the recycling of decomposed materials. Some of the ants eat the other insects and caterpillars that are harmful to the plants and will help nourish the soil with their processed food. Ants also keep wasps away. Their burrowing activity helps air and water get to the plants’ roots faster. The ants also help in spreading the plants’ seeds.
What would happen if the experiment was repeated using more ants?
The experiment can be repeated using earthworms instead of ants. I would also consider repeating the experiment with a variety of other plants, or perhaps more plants, to obtain more accurate/reliable results.
Soils life - http://en.wikipedia.org/wiki/Soil_life
Effect of ants and earthworm on soil habitat modification - http://www.jstor.org/pss/20112621
Be careful when handling the ants. They bite! Wear protective gloves. Adult supervision recommended.