topsoil
Sign in to savethumb|Surface runoff of topsoil from a field in Iowa during a rainstorm
Article
12 sectionsContents
- Description
- Production
- Classification
- Evaluation
- Carbon to nitrogen ratio
- Commercial application
- Erosion
- Conservation
- See also
- References
- Further reading
- External links
thumb|Surface runoff of topsoil from a field in Iowa during a rainstorm
Topsoil is the upper layer of soil. It has the highest concentration of organic matter and microorganisms and is where most of the Earth's biological soil activity occurs.