Summary:
- Soil anchors plant roots and provides them with water and nutrients.
- About half of the soil is made of pieces of rock and minerals.
- The other half is organic materials.
- Inorganic materials are made from non-living substances like pebbles and sand.
- Soil is an ecosystem all by itself!
- In the spaces of soil are millions of living organisms.
- These include earthworms, ants, bacteria, and fungi.
- Soils with lots of very small spaces are water-holding soils.
- When clay is present in a soil, the soil holds together more tightly.