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Definitions from WordNet

Definitions from the Web

a-horizon

Definition

The a-horizon refers to the topmost layer of soil in a soil profile, commonly known as topsoil. It is rich in organic matter, minerals, and nutrients, making it the most fertile and productive layer of soil.

Senses

Noun

1. The uppermost layer of soil, typically dark in color, characterized by its fertility and organic content.

Sample Sentences

• The a-horizon of this field has been well-maintained and is perfect for planting crops.
• The a-horizon forms as a result of years of weathering and decomposition of organic matter.

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