Year 5 NAPLAN Reading Prep

The Secret Life of Soil

Beneath your feet lies one of the most important — and most overlooked — ecosystems on Earth. A single teaspoon of healthy soil contains more living organisms than there are people on the entire planet. Scientists estimate that there are billions of bacteria, millions of fungi, and thousands of tiny creatures such as mites and springtails in just a small handful of dirt.

These microscopic organisms play a vital role in keeping our world alive. Bacteria break down dead leaves and animals, turning them into nutrients that plants can absorb through their roots. Fungi form vast underground networks, sometimes called the "Wood Wide Web," that connect the roots of different trees and allow them to share water and food. Without these hidden helpers, forests would struggle to survive.

Earthworms are another essential part of the soil team. As they tunnel through the ground, they create tiny channels that allow air and water to flow deep into the earth. Their droppings, known as castings, are one of the richest natural fertilisers available. Charles Darwin spent nearly forty years studying earthworms and concluded that "it may be doubted whether there are many other animals which have played so important a part in the history of the world."

Unfortunately, soil is under threat. Deforestation, over-farming, and the use of chemical pesticides can destroy the delicate balance of organisms living underground. Once soil is damaged, it can take hundreds of years to recover. Some scientists now warn that we must protect our soil with the same urgency that we protect our oceans and rainforests.

The next time you walk across a garden or a park, remember: you are walking on top of a hidden universe, teeming with life and quietly keeping our planet healthy.