Environmental Science
Organic Matter in Soil
Quick fact
Organic matter can make up 2–30% of soil by weight, depending on location and management.
Why this is interesting
Did you know that the soil beneath your feet contains ancient leaves, animal remains, and even bits of old trees? This hidden world fuels plant growth.
Read the full explanation
Understanding Organic Matter in Soil
Organic matter in soil is made from decomposed plants and animals. As these materials break down, they release nutrients that help plants grow. It also improves the soil's ability to hold water and supports beneficial microbes.
A deeper explanation
Organic matter forms through decomposition by microorganisms like bacteria and fungi. These processes convert complex organic compounds into simpler substances, making nutrients available for plant roots. This cycle is essential for maintaining fertile soil and sustaining ecosystems.