Soil opening

A soil opener for driving through soil in a direction of travel, the soil opener comprising:

• a leg having a hinge configured to permit castoring of the leg when driven through soil;
• first and second soil-cutting members mounted on the leg so as to be substantially coincident in the direction of travel;
• wherein:
• the first soil-cutting member has a first soil-engaging surface inclined:
• at a first angle to a perpendicular to the soil surface when viewed along the direction of travel, the first angle being greater than zero;
• and
• at a second angle to the direction of travel when viewed along a perpendicular to the soil surface, the second angle being greater than zero;
• and
• the second soil-cutting member comprises a rotating disc and has a second soil-engaging surface that faces away from, and in a substantially opposite direction to, the first soil-engaging surface, the second soil-engaging surface being inclined:
• at a third angle to a perpendicular to the soil surface when viewed along the direction of travel, the third angle being greater than zero and in the same sense as said-the first angle.