这是世界上一些主要农作物产量增长速度的下降。
This is the decline in the growth in yields of some of the world's major crops.
早在使用机械和化肥之前，勤劳和富有创造性的中国农民就已经采用各种各样的方法来增加农作物产量。
Long before the use of machinery and fertilizers, industrious and creative farmers had already used different kinds of methods to increase crop yields.
由于作为六十年来最严重干旱丝毫没有减弱的迹象，农作物产量将大幅下滑。
Crop production has fallen sharply, as the worst drought in six decades shows no sign of letting up.
更加暖和的气温实际上能够增加北美以及俄罗斯一部分地区的农作物产量。
Warmer temperatures are actually leading to increased crop yields in some parts of North America and Russia.
河水和溪流日渐干涸，农作物产量急剧下降，离春天还远，树木就进入了花期。
Rivers and streams are drying up, crop yields are plummeting, and trees have begun to flower long before spring arrives.
我们的现状是，没有为农业分配大量资金的动机，也没有为显著扩大农作物产量而开发新技术的动力。
We've got a situation where there has been no incentive to allocate significant new capital to agriculture or to develop new technologies to dramatically expand crop output.
海平面上升、农作物产量减少、更猛烈的风暴和更多令人沮丧的后果所造成的经济影响将是毁灭性的。
The economic impact of rising sea levels, reduced crop yields, fiercer storms and many other doleful consequences would be devastating.
当然了，富裕国家也受到了影响：长期的干旱已经造成澳大利亚农作物产量暴跌。
Of course, wealthy countries are affected: long-term drought in Australia has caused certain crop yields to plummet.
并且由于丰富的表层土被冲刷掉，土地侵蚀威胁到农作物产量。
And because it washes away rich topsoil, erosion can threaten crop yields.
此外，有一个简单的方法或多或少能够消除迄今为止气候变化对农作物产量的影响。
Moreover, there is a simple way more or less to abolish the effect of climate change on yield to date.
仅在十年以后，非洲某些地方的农作物产量预计将减少50%。
Just a decade from now, crop yields in some parts of Africa are expected to drop by 50%.
该做法也被其他地方效仿。尽管农民能用的水比以前要少很多，但这种做法使他们度过了这个很长的干旱期，使它们的农作物产量不会减少。
The practice caught on elsewhere, helping the farmers of the basin to get through the recent long drought using far less water than before yet with no reduction in output.
改善塔里木盆地的水资源管理增加了农作物产量，扭转了沙漠化趋势，提高了妇女的社会地位并增加了妇女的就业机会。
Better management of water resources increased crop yields, reversed desertification, and improved social status and employment opportunities for women.
“不过，”桑德斯说，“我们的研究明确显示，控制真菌的遗传特性从而取得更高的农作物产量是有可能的。”
"However," Sanders said, "our study clearly shows that the potential is there to manipulate the genetics of the fungus to achieve greater crop yields."
科学家希望开发出的新品种能使农作物产量增加百分之三十。
The scientists hope that the resulting crop will increase yield by 30 percent, according to Oikeh.
即使农作物产量停止增长，在公路、市场和其它方面容易取得改进能够使食物的有效利用大大增加。
Easily achievable improvements in roads, markets and other things can increase the availability of food a lot even if farm yields stop rising.
农民在耕作和提高农作物产量方面越来越依赖复杂的机械设备，由此造成了农业技术人员和工程师的短缺。
Farmers are relying on increasingly sophisticated equipment to work the land and boost crop yields, placing a premium on agricultural technicians and engineers.
尽管气候变暖，但世界各地的农作物产量一直在增加——而且29年来的这种增产超过了估计的由于气候变化造成的全球减产。
Yields have been going up around the world despite the warming climate—and over 29 years those increases swamp the estimated global reductions due to climate.
科学家们希望借助各种新技术来进一步提高农作物产量，如本周发布的小麦基因组，就有助于庄稼种植者培育改良品种。
Scientists hope to boost yields even further through discoveries, such as this week's publication of the wheat genome, which would help crop breeders to develop improved varieties.
例如有一些科学家就认为：气温每升高一度，农作物产量就会下降百分之十。
Some scientists believe, for instance, that crop yields decline 10 percent for each degree rise in temperature.
她说天气影响农场的方方面面，包括土壤，害虫以及农作物产量。她说所有这些都会影响利润。
She says weather affects every part of a farm, including the soil, animals that eat the crops and crop production. She says all these affect profit.
农作物产量和产值的变化如果引致收入波动，这对农民来说就可能是有害无益，因为稳定了价格可能稳定不了收入。
Farmers can lose rather than gain if incomes fluctuate because of variations in crop yields and outputs-stable prices can then destabilize incomes.
将农作物废料及其它生物质转化成炭并将其施于热带土壤的方法可以固碳并能提高农作物产量。
Turning crop wastes and other biomass into charcoal and spreading it on tropical soils can sequester carbon and boost crop productivity.
农业生物学；土壤生物学关于植物养分和与土壤条件相关的生长的研究，尤其是对判定如何增加农作物产量方法的研究。
The study of plant nutrition and growth as related to soil condition, especially to determine ways to increase crop yield .
农业生物学；土壤生物学关于植物养分和与土壤条件相关的生长的研究，尤其是对判定如何增加农作物产量方法的研究。
The study of plant nutrition and growth as related to soil condition, especially to determine ways to increase crop yield .
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