belt of soil water

belt of soil water

[¦belt əv ′sȯil ‚wȯd·ər]
(geology)
The upper subdivision of the zone of aeration limited above by the land surface and below by the intermediate belt; this zone contains plant roots and water available for plant growth. Also known as belt of soil moisture; discrete film zone; soil-water belt; soil-water zone; zone of soil water.