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1·When one comes to more tractable land at lower altitudes, problems of permanent pasture improvement are not nearly so difficult.

在海拔较低的易于耕作的土地上，改进永久草场的问题并不很困难。

2·Land was used for permanent pasture, therefore farming was extensive. This zone extends to the margins of cultivation, beyond which was wasteland.

土地用作放牧之用，耕作为粗放式，这地带伸延至耕种边界，以外的是荒地。

3·In Wales, where most of our studies have been done, energy crops would most likely replace sheep grazed leys which are classed as permanent pasture.

在威尔士，我们的大多数研究已经完成，很有可能将以能源农作物取代被归类于“永久的”牧场的绵羊喜食的牧草。