原始文本 - 英语 - The extremely open landscape of wide undulating...

The extremely open landscape of wide undulating plains with regular plots of arable land, is called 'openfield'.
Continuous felling, slash-and-burn agriculture, and overgrazing gradually turned the mixed oak woodland into an open landscape with local arable openfields, enclosed pastures, some left-over wooded land, heaths, bogs and fens. In the eighteenth and nineteenth centuries, heaths were ploughed up to feed the growing population.