When planting the potato pieces, pull a ridge of soil over each row. Dragging across the ridges just before sprouts break through helps eliminate any weeds and grasses and allows the sprouts to break through more easily. Later cultivation should be shallow and far enough from rows to make certain no roots are pruned. When plant tops have made sufficient growth so that cultivation must stop, a finishing cultivation, sometimes called "laying by", is given. "Laying by" throws soil over the potatoes to help prevent exposure to the sun, which can cause greening and "scalding".
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