27. they may help boost productivity on some of the developing world's marginal lands.

它们可能有助于提高一些发展中国家边缘土地的生产力。

Here in California, half of all land in the state is marginal land, is rangeland used for cattle.

在加利福尼亚州，该州一半的土地是边际土地，是用于养牛的牧场。

If you were already working on a collective farm, you might sneak off to some marginal land to grow your own crops on the side.

如果你已经在集体农场工作， 你可能会偷偷溜到一些边缘土地上，在旁边种植你自己的庄稼。

Another big chunk of the book is about how we should do things in a way that fits better within nature, and that's things like stop farming within marginal land.

这本书的另一大块是关于我们应该如何以更适合自然的方式做事，比如停止在边际土地上耕种。

Then, on these marginal lands really not meant for corn, you're increasing nitrogen use, the tilling, going back and forth on these acres, increase of gasoline use in the tractors that are used. All of this has environmental consequences.

然后，在这些真正不适合种植玉米的边缘土地上，你正在增加氮的使用，在这些英亩土地上来回耕种，增加所用拖拉机的汽油使用量。所有这些都会对环境产生影响。