A soil opener comprises first and second soil-cutting members. The first member has a first soil-engaging surface inclined at a first angle perpendicular to the soil surface when viewed along a travel direction, the first angle being greater than zero, and at a second angle to the travel direction when viewed along a perpendicular, the second angle being greater than zero. The second 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 perpendicular when viewed along the travel direction, the third angle being greater than zero and in the same sense as the first angle.
