Agricultural and horticultural machines; agricultural, arboricultural, horticultural machinery and equipment; stump grinding machinery; earth moving machinery; log handling machinery of all descriptions and parts of such machinery included in this class inclusive of ploughs, harrows, grinders, rippers, cultivators and crop treating equipment; Self-propelled, pull-type, coupled, semi-integral, attached or onmounted machines and implements and their parts for agricultural, arboricultural and horticultural use