The soil is depleted first by crops grown in it and second by bacterial action.
土壤首先被其中生长的农作物消耗，其次被细菌活动消耗。
For example, cheap forms of irrigation have depleted the water table in many farm areas of India, while at the same time adding near-toxic levels of salts from fertilizers to the soil.
例如成本低廉的灌溉方式已经使印度很多地区的地下水干涸，化肥中高剂量的盐分残留在土壤内。
Plus, the soil is depleted, right? Meaning that it's less useful for growing food.
加速了土壤变质，对吗？意味着这样的土壤对作物生长没有用。
The soil is depleted first by having crops grown in it and second by natural weathering and bacterial action.
土壤首先是被种植其中的作物消耗掉，其次受自然风化和细菌活动的侵蚀。
When nutrients have been depleted, addition of adequate fertilizers can reverse the trend of soil organic matter depletion.
养分耗竭后，施用足量肥料能逆转土壤有机质耗竭的趋势。
Malawi's soil, like that across sub-Saharan Africa, is gravely depleted, and many, if not most, of its farmers are too poor to afford fertilizer at market prices.
和整个撒哈拉非洲的土地一样，马维拉的土地极度贫瘠，而大多数的农民却因为贫穷，根本无力以市场的价格购买化肥。
Malawi's soil, like that across sub-Saharan Africa, is gravely depleted, and many, if not most, of its farmers are too poor to afford fertilizer at market prices.
和整个撒哈拉非洲的土地一样，马维拉的土地极度贫瘠，而大多数的农民却因为贫穷，根本无力以市场的价格购买化肥。
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