After all, population growth is slowing and yields of some crops, notably maize, are still rising at a steady pace.

毕竟，人口的增长在减速，而某些农作物的产量，特别是玉米，仍在以一个稳定的速率增长。

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There is the worry that an increase in the use of food crops such as maize, cassava and sorghum is likely to increase the food price of most staple foods in Africa, notably corn.

人们担心对粮食作物如玉米、木薯和高粱不断利用可能会造成非洲主要粮食价格的不断上涨，特别是玉米。

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