AMMO by MIG Enamel Heavy Mud - Enamel Mud for Modelling
Color: Thick Soil

From the Manufacturer:

Yellow Brown textured dry soil effect can be used to create the accumulation of heavy summer soil. Realistically adds the final touches of variable textured mud to your model. Apply with a brush or tool, manipulate or remove with a clean brush moist with thinner. This effect can used alone or with other enamel earth tones.

As this product is enamel, they can be diluted with A.MIG-2018 Odorless Thinner to easily create streaking effects or very smooth transitions.