To prepare your garden for carrots, dig up the soil, loosen it and turn it over. Then, mix in some plant material or animal fertilizer.
为种植萝卜而打理好你的花园，你要掘起并翻松土壤，然后混进一些植物原料或者动物肥料。
These bacteria not only help the plants they live on, but release useable nitrogen into the soil which is taken up by other plants, and in turn passed on to animals that eat those plants.
这些细菌不仅有助于植物存活，同时将有用的氮原子释放到土壤中，给其他植物使用，进而传递给以这些植物为食的动物。
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