Wheeler said that scientists have not yet studied the yam's nutritional value to see what benefits the plant offers as a food crop.

怀勒说，科学家尚未对这种山药的营养成分及食用益处进行研究。

youdao

IT IS the world's fourth-most-important food crop, after maize, wheat and rice.

在世界的粮食作物中，它的重要性仅次于玉米、小麦和稻谷。

youdao

It noted the potato — the Number 4 food crop worldwide — is already a staple food in the diet of the world population.

这使得马铃薯——全球第四大食品作物，即将要作为全世界人民的日常主食。

youdao

Mr.Czudek says the loss of a maize crop can mean the loss of a family's food supply for a year.

VOA: special.2010.07.27

Economists blamed the crisis on different causes, including high energy costs, bad weather and the use of food-crop lands for biofuel production.

VOA: special.2010.03.23

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

VOA: special.2010.06.08

Another proposal: guaranteeing a minimum size for food crop fields to ward off avaricious cadres.

CNN: UP AND DOWN ON THE FARM

Seventy-five per cent of the food crop varieties we once grew have disappeared from our fields in the last 100 years.

FORBES: The Future of Life On Earth: Part Two Of The Discussion

Typically, officials reduce a family's "food crop" land and increase the family responsibility portion, over which they can exert more control.

CNN: UP AND DOWN ON THE FARM