It can be washed out when it rains or it can be released to the atmosphere, whereas phosphorus combines with calcium and iron, and can be preserved in the soil for thousands of years.

它可以在下雨时被冲刷掉，也可以释放到大气中，而磷与钙和铁结合，可以在土壤中保存数千年。

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In the hills, torrents of water washed soil away, or left it but rinsed the nutrients out of it.

ECONOMIST: Honduras and Nicaragua