In determining whether the manner in which a unit is being farmed is such as aforesaid regard shall be had, but without prejudice to the generality of the provisions of the last foregoing paragraph, to the following:—
(a) the maintenance of permanent grassland (whether meadow or pasture) properly mown or grazed and in a good state of cultivation and fertility;
(b) the handling or cropping of the arable land, including the treatment of temporary grass, so as to maintain it clean and in a good state of cultivation and fertility;
(c) where the system of farming practised requires the keeping of livestock, the proper stocking of the holding;
(d) the maintenance of an efficient standard of management of livestock;
(da...