1SFor the purposes of this Act, the occupier of an agricultural unit shall be deemed to fulfil his responsibilities to farm it in accordance with the rules of good husbandry in so far as the extent to which and the manner in which the unit is being farmed (as respects both the kind of operations carried out and the way in which they are carried out) are such that, having regard to the character and situation of the unit, the standard of management thereof by the owner and other relevant circumstances, the occupier is maintaining a reasonable standard of efficient production, as respects both the kind of produce and the quality and quantity thereof, while keeping the unit in a condition to enable such a standard to be maintained in the future.