Techniques and circuitry are provided for programmably controlling signal offsets in integrated circuitry. The broken line showing of the boundary is for illustrative purposes only, and forms no part of the claimed design. The mobile repeater telephones have a software program stored on the processors of the telephones or a database that is accessible by the telephones. A packer wheel is arranged in a first configuration where depth of disc penetration is gauged by a gauge wheel adjacent to the furrow opener and in a second configuration in which depth is gauged by the packer wheel. The modulus of the first adhesive is less than the modulus of the second adhesive. The rack assembly includes tines, referred to herein as vertical members, that can hold both large and small bowls in a vertical orientation.