greensand
/ˈɡriːnsænd/Definitions
1. noun
A type of sand or soil that is rich in plant nutrients and organic matter, often found in coastal or estuarine environments.
“The gardeners used greensand to improve the fertility of the soil in their greenhouse.”
2. verb
To treat or enrich soil with greensand.
“The farmer greensanded the fields before planting the crops.”