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。