Concept:A farm implement is a tool used directly for field operations such as cutting grass or mowing.Explanation:A dryer removes moisture from harvested produce; it is a processing machine.A sheller removes grains from cobs or pods; it is also a processing machine.A mower cuts grass or crops in the field; therefore it is a direct field implement.A mistblower applies chemicals such as pesticides; it is a spraying device, not a field implement.Among the given options, the mower is the equipment used directly as a farm implement.Answer:C. Mower