Even on lifting there are two schools of thought; some say that a fork is best on light soils, and a spade on heavy, whereas others advocate using a spade whatever the soil.

A spade, if used carelessly, may cut through tubers which a fork would miss, but there is much less chance of breaking tubers as the whole weight will be supported on the blade. If a fork is used, some part of the tuber may resist lifting, as the finer roots have not been removed, and severe damage may be caused by the uneven pressure.

On balance I think a spade is best. Cuts should be made all round the tuber, about 6 to 8 in. away from the stem, gently lifting the tuber an inch or so each time the blade is inserted to loosen the hold of the fibrous roots. Finally the spade should be driven down and under the tuber, and the tuber firmly lifted from its bed, as you grasp the stump of the stem with the free hand to prevent sideways movement.