It was first isolated from forest soil, under pine trees, in northern Virginia.

Found in the A-horizon of forest soils and lake sedimentation.

They hid in barns and built bunkers under the forest soil.

But other tropical forest soils bake into virtual concrete when the cover is removed.

The average elevation of the region is 1,200 meters, with brown forest soils.

Put some forest soil in a container, and just wait for the weeds to sprout.

Many of these worms die since they are not well adapted to the new conditions of the forest soil.

The dark and porous forest soils were formed from volcanic ash.

The old road helped with his direction, but the forest soil made easier going.

The most frequent type is brown alluvial forest soil.