The first mouldboard ploughs could only turn the soil over in one direction ( conventionally always to the right ) , as dictated by the shape of the mouldboard .
So the field had to be ploughed in long strips , or lands .
The first mouldboard ploughs could only turn the soil over in one direction ( conventionally always to the right ) , as dictated by the shape of the mouldboard , and so the field had to be ploughed in long strips , or lands .