广播电视英语短句 第 320 课：肥料使用-3

Farms in western Kenya use just over one-tenth as much fertilizer as American farms. 肯尼亚西部的农田肥料施用量仅为美国农田的十分之一。

Corn harvests remain small. 玉米产量仍然很低。

The researchers say farming methods in Sub-Saharan Africa need to improve or else poor quality soil will increase rural poverty. 研究人员称，撒哈拉以南非洲的耕种方式需要提高，否则，贫瘠的土壤会增加农村地区的贫穷。

More than two hundred fifty million people do not get enough nutrients from crops to stay healthy. 2.5亿多人不能从作物获得足够的营养来保持身体健康。

Nutrient balances in agriculture differ with economic development. 农业系统中的养分平衡根据经济发展状况而有所不同。