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.
介绍了农作物产量灾害损失评估业务化方法。
An operational method of crop yield disaster losses evaluation is introduced.
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.
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.
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%.
土壤盐渍化是降低农作物产量的主要环境因素之一。
Soil salinity is one of chief environmental factors that limit the crop yield potential.
一个地区水量的充足与否直接影响该区农作物产量的高低。
Quantity of water supply of an area will directly influence the production of crop yield.
然而，如何扩大他的农作物产量这一问题却一直在困扰着他。
However, it always confused him how to expand the output of his crops.
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.
热带农作物产量下降。这首流行歌曲在该社区居民中受欢迎。
The output of the tropical crop drops . This pop song is popular in the population of this community.
海河低平原类型区，水资源不足是农作物产量的主要限制因子。
In Haihe Lowland Plain, water shortage is the main limit factor for agriculture production.
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.
农民在生产作物品种方面有了更大的选择，农作物产量得以提高。
Peasants were also allowed far greater choice in what crops to plant. Food production rose.
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.
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.
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.
虽然在此期间，中国农作物产量增长了4.5倍，但需求增长得更快。
Although Chinese agricultural output has grown by a factor of 4.5 in this period, demand growth has outpaced production.
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.
对其低产原因及改良措施的研究，对这一地区农作物产量水平的提高有重要作用。
It plays an important part in increasing the yields to study the reasons for low yields and the improvement.
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.
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.
目前，国内对农作物区域产量保险的研究较为少见，农作物产量保险精算研究则更为薄弱。
Nowadays, there is scarce domestic research on area yield crop insurance, let alone relative actuarial research.
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.
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.
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