echard

Definitions

1. The portion of water in a sample of soil that is not available to vegetation.
   dated
2. A surname.

Examples

“The echard of a given habitat is experimentally ascertained by isolating a block⟳ of soil by impermeable plates, allowing it to dry slowly and determining its water-content at the time when the plants growing on it are wilting irrecoverably”

“Grasses sprout on the sands long before the early rains have⟳ restored the echard of adjoining clays and given a surplus as chresard which can initiate grass growth.”

CEFR level