Organic Matter Explained
Organic matter is plant and animal material in various stages of decomposition.
It is one of the most important components of healthy soil.
Sources of Organic Matter
Examples include:
- Compost
- Decomposed leaves
- Plant roots
- Crop residue
- Animal manures
- Cover crops
Why It Matters
Organic matter helps soil:
- Hold water
- Drain better
- Resist compaction
- Support microorganisms
- Store nutrients
- Form stable aggregates
Clay Soil
In clay, organic matter can improve structure and drainage.
Sandy Soil
In sand, organic matter improves water and nutrient retention.
It Is Not the Same as Fertilizer
Compost supplies some nutrients, but its biggest value is often physical and biological soil improvement.
Build It Slowly
Add organic matter through:
- Compost
- Mulch
- Cover crops
- Leaving healthy roots in soil
- Returning plant residues when appropriate
Don’t Chase Huge Numbers
Extremely high organic matter is not necessary.
The goal is steady improvement.
GardenGrowz Tip
Organic matter is one of the few soil improvements that helps both heavy clay and loose sandy soil.