Answer:

marls

Answer	Crossword Clue
MARLS	Loose clays
MARLS	Earthy deposits.
MARLS	Valuable fertilizers.

MARLS	Fertilizers.
MARLS	Soils of clay and sand.
MARLS	Clay soils.
MARLS	Crumbly soils.
MARLS	Clayey deposits.
MARLS	Fertilizes
MARLS	Friable soils
MARLS	Crumbly earth deposits

MARLS	Earthy deposits
MARLS	Fertilizes with loam
MARLS	Clay mixtures

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.