In recent years, prairie farmers have sought to diversify their crops to minimize the effects of badcrop years or reductions in the price of wheat.
近年来，草原上的农民一直在努力使作物品种多样化，尽量降低小麦歉收年和价格下跌的影响。
2
To take an extreme example, farmlands dominated by a single crop are so unstable that one year of bad weather or the invasion of a single pest can destroy the entire crop.
举个极端的例子，以单一作物为主的农田是如此不稳定，一年的坏天气或单一害虫的入侵可以摧毁整个作物。
3
A bad bout of cold weather, a long spell of frosts could ruin a farmer's entire crop.