Rice is a major crop that feeds about one half of the world's population.

水稻是世界的重要粮食作物，全球有二分之一左右人口以大米为主食。

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Wheat (Triticum aestivum L. ) is an important and a major crop not only in China but also in the world.

小麦是中国和世界上最重要的粮食作物之一，但其生产正受到虫害日益严重的威胁。

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Nigeria the world largest producer of cassava is keen to use its major crop as an alternative to fossil fuel.

世界上最大的木薯生产国尼日利亚很热衷于将其主要的作物作为化石燃料的一种替代品。

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The plant is a major source of food energy and a major food security crop.

VOA: special.2010.06.08

African yields rank dead last in every major crop harvested, from corn to cotton.

FORBES: Millions Served

It's a major crop in South Africa, Zimbabwe, Malawi and Tanzania, as well as Mozambique.

NPR: U.S., European Subsidies Undercut African Farmers

Every major crop around the globe is being stunted, from rice to wheat to cotton to soybeans.

FORBES: Protesters To Target Koch Brothers' Secretive 'Billionaires Caucus'