Better irrigation can dramatically improve crop yield and about 40% of the world's food supply is currently derived from irrigated land.
更好的灌溉可以显著提高作物产量；目前，全球约40%的粮食供应都来自于灌溉地。
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。
Barley was an unexpected find: the crop was domesticated in Western Eurasia and didn't become a staple food in central China until about 2,000 years ago, according to the researchers.
研究人员说，大麦是一个意外发现：这种作物生长在欧亚大陆西部，直到大约两千年前才成为中国中部地区的主食。
Barley was an unexpected find: the crop was domesticated in Western Eurasia and didn't become a staple food in central China until about 2, 000 years ago, according to the researchers.
研究人员说，大麦是一个意外的发现：这种作物在欧亚大陆西部被引进，直到大约2000年前才成为中国中部地区的主食。
To be more exact: growth in population and demand for food have both slowed down, but crop yields have slowed more.
为了更准确：人口增长和食物需求增长都放慢了，但粮食产量放慢更多。
For example, if genetic engineering simply moves a gene for a common food ingredient from one safe food crop to another, this does not expose consumers to new components in their food supply.
例如，如果基因工程单单从一种安全粮食作物的一种普通食物成分的基因转移到另一种作物，这并不使消费者受到事物供给中新成分的影响。
As rice is the most important food crop in the world and maize is the main form of animal feed, these decisions could have a big impact.
由于水稻是世界上最重要粮食作物，而玉米是动物的主要食物，这些决定可能有重大影响。
As a food crop, corn is also far more damaging to the environment than other crops, such as soybeans, because it USES more pesticides and fertiliser.
作为一种粮食作物，玉米比大豆等其他作物对环境影响更大，因为它需要更多的肥料和杀虫剂。
But that is because the virtues of the world's fourth biggest food crop (after maize, wheat and rice) and its influence on world history are easily overlooked.
不过，这是由于人们很轻易地忽略了这种全球第四大粮食作物(仅位于玉米、小麦和水稻之后)的优点和它对人类历史上的影响的缘故。
Wheeler said scientists have not yet studied the yam's nutritional value to see what benefits the plant offers as a food crop—and despite its popularity, pickings are already slim.
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。尽管安格那山药深受欢迎，但产量稀少。
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。
Turning the food crop into ethanol would not be the best use of the energy embedded in the kernels' carbohydrates, according to a new study in Science.
据刊登在科学在线的最新研究，农作物所含的碳水化合物中蕴涵着能源，但以农作物为原料生产生物酒精并不是利用它们的最好方法。
Also, our farm produces food continuously - one crop after another, all year-round.
同时，我们的农场一直会生产谷物，一个接着一个，全年不休。
Those problems might or might not be solved by more advanced biofuels, such as those made from the non-food or cellulosic parts of crop plants or even non-food crops such as switchgrass or algae.
是否能依靠更加先进的生物燃料(比如利用非食物农作物或者利用农作物的纤维素部分、甚至利用柳枝稷或者海藻这些非食物作物来制造生物燃料)来解决上述这些问题还是个未知数。
Quinoa is a traditional food crop in the Andes Mountains.
藜麦是安第斯山脉的一种传统粮食作物。
Winter wheat is the most important food crop in North China Plain, normally, it sown along with barely in early fall after the harvesting of summer crops such as broomcorn and soybeans.
冬小麦是华北平原最重要的粮食作物，通常是和大麦一起，在秋初继收成夏季作物如高粱、大豆之后播种的。
There is even a Web site to help bring more attention to the world’s third most important food crop, after rice and wheat: potato2008.org.
甚至建立了一个网站：potato2008.org来帮助人们更多的关注继大米和稻谷之后的世界第三大重要农作物。
The small brown rice planthopper is an injurious insect on food crop of Ningxia.
灰飞虱是宁夏粮食作物上的一大害虫。
Collecting fertilization data by spot check, combining with the nutrient qualilty of the furrow soil, we analyzed the fertilization and nutrient structure on the food crop farmland of Fuping County.
采用抽样调查收集的农田施肥数据，结合耕层土壤养分状况，分析了阜平县主要粮食作物的农田施肥状况和养分结构。
Prices for rice, the main food crop, have doubled in Bangladesh in the past year.
在去年，孟加拉国的主要食物作物大米的价格增长了一倍。
Rice is not only the most important food crop in the world, but also a model plant for study of the molecular developmental biology in monocots.
水稻是世界上最重要的粮食作物之一，也是单子叶植物发育分子生物学研究的理想模式植物。
Maize is main feed, industrial materials and food crop in China.
玉米是我国主要饲料、工业原料和粮食作物。
Maize eis the most important food crop for millions of people in the world.
玉米是全世界千百万人最主要的粮食。
Today, the potato is Kazakhstan's most important food crop after wheat, with average per capita consumption of a high 90 kg a year.
如今，在哈萨克马铃薯是仅次于小麦的最重要粮食作物，年人均消费量为90公斤。
Rice is the most important food crop in the world and has become one of the model crop for the research of molecular biology.
水稻是世界上重要的粮食作物，并已成为分子生物学研究的模式作物之一。
Wheat is one of the most widely grown crop in the world and it is the most important food crop of northern China.
小麦是世界上种植最广泛的农作物之一，也是我国北方最重要的粮食作物。
Wheat is one of the most widely grown crop in the world and it is the most important food crop of northern China.
小麦是世界上种植最广泛的农作物之一，也是我国北方最重要的粮食作物。
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