Soil science studies what happens underground.
The soil contains small particles of rocks and minerals, holes, plant roots, and millions of tiny organisms. All of them play an important role in how the soil functions.
The particles and organisms bind water and nutrients. The holes help transport water and air. The small organisms bind the particles together and produce nutrients for plants.
Nutrient rich and healthy soil make plants grow. Organisms in the soil receive food through the roots of plants. Plant roots and organisms form a living support network beneath the ground.
This network makes soil firm. It can then withstand heavy rain and the weight of machinery. It can handle drought as well.
Most of the food humans eat grows in the soil. If the soil is healthy, plants grow well and produce plenty of food. Firm and healthy soil ensures that plants can use the available nutrients. Nothing ends up in lakes, seas or the air.
By looking after the soil, we also protect waterways and the climate.