| 摘要 |
<p>A multi-layer, biodegradable, ground surface sheet (1) of paper or cardboard incorporates linseed oil, etc as preservative. It has a corrugated lower layer (3) providing airflow channels (6) across upper surface (10) of soil, mulch, etc, (11) over subsoil (12). Upper layer (2) of sheet (1) may be flat (as shown) or have a further layer of upward-facing corrugations. Air pockets between layers (2, 3, etc) provide insulation. Sheet (1) is urolled from a vehicle, passed through a bath so that additives such as fertiliser, fongicide, pesticide, etc, are absorbed, and then fixed to the ground using biodegradable, swellable pegs or by clipping to wires running along sides of sheet (1).</p> |
