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.

• 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。