An erosion barrier implementing the invention is a filter berm advantageously
comprising a biodegradable "sock" filled with a biodegradable material, e.g., using
conventional blower techniques. The sock is composed of materials, such as burlap,
that naturally rot and decompose. Thus, when the sock decays, it merges into the
surrounding soil and thus leaves no trace. Preferably, the biodegradable material
comprises compost that is pre-seeded to allow desired vegetation to grow from the
compost into the underlying soil. In this manner, the vegetation anchors the berm
and prevents it from eroding, even when its exterior sock is fully decomposed.
In an exemplary embodiment, the sock may be constructed with larger holes on its
bottom so as to allow the material in the berm to effectively bind and adhere to
the soil beneath.
