A horizon

ریشه

Derived from the combination of the indefinite article 'a' and the noun 'horizon'. In soil science, 'horizon' refers to a layer of soil or soil material approximately parallel to the land surface.

مثال

• The A horizon is where most biological activity occurs.
• Farmers often add nutrients to the A horizon to improve crop growth.
• The A horizon is usually darker than the other soil layers because of the organic material it contains.

ترکیب‌های رایج

A horizon of soil A horizon layer A horizon topsoil