有时，过度耕种和土壤侵蚀都能造成干旱。但是，尽管有时人们很注意保护土壤，旱灾依然会发生。

Sometimes over-farming and soil erosion contribute to drought, but there are also natural disasters that can occur even when soil is carefully preserved.

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但是这些农户们时刻面临着全球人口不断增加、土地过度耕种贫瘠、气候变化导致的严重干旱或洪涝灾害等巨大挑战。

They face challenges from an increasing population; land that's overfarmed and worn out; and climate change, bringing with it worsening drought or increased rainfall.

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例如，过度耕种的土地可能发生有机碳和营养的减少，包括磷或氮，降低了土壤的肥力，在农作物密集的地区往往是这样。

For example, a reduction in organic carbon and nutrients, including phosphorus or nitrogen, as may occur in intensively farmed areas, DE creases the fertility of soils.

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