A disc cutter for an agricultural implement, comprising: a disc body configured to rotate in a rotation direction; a knife mount carried by the disc body and comprising a body mounting feature; and a knife coupled to the knife mount, the knife comprising: a first cutting section comprising a first knife mounting feature disposed on or in a first knife surface between a pair of first edges (413,414) of the first cutting section and configured to couple with the body mounting feature, each of the first edges (413,414) defining a first cutting angle (α1) with respect to the first knife surface such that the first edges (413,414) extend in parallel; and a second cutting section comprising a second knife mounting feature disposed on or in a second knife surface between a pair of second edges (423,424) of the second cutting section and configured to couple with the body mounting feature, each of the second edges (423,424) defining a second cutting angle (α2) with respect to the second knife surface such that the second edges (423,424) extend in parallel, characterized in that the first cutting angle (α1) and the second cutting angle (α2) are different values. a disc body configured to rotate in a rotation direction; a knife mount carried by the disc body and comprising a body mounting feature; and a knife coupled to the knife mount, the knife comprising: a first cutting section comprising a first knife mounting feature disposed on or in a first knife surface between a pair of first edges (413,414) of the first cutting section and configured to couple with the body mounting feature, each of the first edges (413,414) defining a first cutting angle (α1) with respect to the first knife surface such that the first edges (413,414) extend in parallel; and a second cutting section comprising a second knife mounting feature disposed on or in a second knife surface between a pair of second edges (423,424) of the second cutting section and configured to couple with the body mounting feature, each of the second edges (423,424) defining a second cutting angle (α2) with respect to the second knife surface such that the second edges (423,424) extend in parallel, characterized in that the first cutting angle (α1) and the second cutting angle (α2) are different values. a first cutting section comprising a first knife mounting feature disposed on or in a first knife surface between a pair of first edges (413,414) of the first cutting section and configured to couple with the body mounting feature, each of the first edges (413,414) defining a first cutting angle (α1) with respect to the first knife surface such that the first edges (413,414) extend in parallel; and a second cutting section comprising a second knife mounting feature disposed on or in a second knife surface between a pair of second edges (423,424) of the second cutting section and configured to couple with the body mounting feature, each of the second edges (423,424) defining a second cutting angle (α2) with respect to the second knife surface such that the second edges (423,424) extend in parallel, characterized in that the first cutting angle (α1) and the second cutting angle (α2) are different values.