Crofters and owner-occupier crofters must cultivate their crofts or else put them to some other purposeful use. “Cultivate” is essentially agricultural use. This includes “the use of a croft for horticulture or for any purpose of husbandry, including keeping or breeding of livestock, poultry or bees, the growing of fruit, vegetables and the like and the planting of trees and use of the land as woodlands. “Purposeful use” means any planned or managed use which does not adversely affect the croft, the public interest, the interests of the landlord or the use of adjacent land.