mixture of clay and lime: a naturally occurring fine crumbly mixture of clay and limestone, often containing shell fragments and sometimes other minerals. Use: fertilizer, water softener.
transitive verb (past and past participlemarled, present participlemarl·ing, 3rd person present singularmarls)
Definition:
fertilize with marl: to add marl to soil as a fertilizer
[14th century. Via Old French marle< medieval Latin margila< Latin marga, after argilla "white clay"]
