11.   Their size and shape make channels for the flow of air and water, helping to aerate the soil and providing drainage.

12.   They aerate the soil, prune trees and fill an important slot in the food chain.

13.   These small, slender snakes are also valuable because they aerate the soil and eat insects, spiders, centipedes and scorpions.

14.   They upset plants, by mistake, as they tunnel, but on the plus side, they are aerating the soil and eating pesky grubs.

15.   Under our feet worms aerate the soil, and fallen leaves turn into nourishing compost.

16.   Earthworms are attracted by the organic mulch, and their tunnelling in the soil matrix aerates the soil, hence improving soil textures.

17.   Thereafter, the most important thing is to aerate the soil.