In Mexico in 1944, many experts warned of mass starvation in developing nations where populations were expanding faster than crop production.
在1944年的墨西哥，许多专家警告，发展中国家的人口增长速度快于粮食生产，会出现大规模饥荒。
Agriculture takes place in nature, among ecosystems of interacting organisms and activity, and crop production takes place within that ecosystem environment.
农业是在大自然中进行的；大自然里的生态系统中各种生物和活动相互影响，而粮食的生产正是处在这样的生态环境中。
One acre of farmland used for crop production can produce 1,500 pounds of tomatoes.
一英亩的农田可以生产1500磅西红柿。
Drought is a major constraint to crop production worldwide.
干旱是作物生产的一个主要限制因子。
In rural India the group is assisting farmers with crop production.
在印度的乡下，组织帮助农场主提高作物产量。
Agronomy a branch of agriculture dealing with soil management and crop production.
农学，农艺学：农业的一个分支，主要研究土地的管理和作物的生产。
Many of the past crop production practices have resulted in environmental problems.
过去的许多耕作措施导致了很多环境问题。
Did draining the land result in crop production greater than those of surrounding areas?
土地排水是否导致了农作物产量比周围地区更高？
Crop production has fallen sharply, as the worst drought in six decades shows no sign of letting up.
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。
In an agricultural setting, the use of variety to increase crop production is an economic and simple way.
利用优良品种以提高作物产量是农业生产上经济易行的措施。
Air pollution causes breathing problems. It also threatens crop production in farm areas near huge cities.
空气污染引起了呼吸道的问题，同时也威胁着大城市附近的农业区农作物的产量。
The latest advances in the modeling of land use-crop production systems at home and abroad were summarized.
对土地利用—作物生产系统模拟研究方面的国内外最新进展进行了综述。
European Union countries have been focusing on improving the quality of crop production and farmers' incomes.
欧盟会员国一向专注于改善农产品的品质和农民的收入。
The mathematics reasoning methods of decision system for crop production management were expounded in this paper.
本文阐述了农作物生产管理决策系统中的数学推理方法。
The researchers studied climate trends and global crop production from between nineteen eighty and two thousand eight.
研究人员研究了1980年到2008年期间气候变化趋势和全球粮食产量之间的关系。
Both in open field and in protection field it suffered from heat injury, which severely influenced the crop production.
在露地和保护地栽培中均存在高温热害，严重影响黄瓜生产。
The model bank, therefore, can provide a quantitative basis for increasing 'modellization cultivation' in crop production.
因此，该模型库对当前作物生产中日益增多的“模式化”栽培，提供了定量的依据。
Food demand is a rigid problem, the essence of the problem of grain self-sufficient rate is how to increase crop production.
粮食需求是一个刚性问题，粮食自给率的问题实质是如何提高粮食产量。
Dry conditions across the American West have spurred water rationing, hurt crop production, and doubled the prevalence of wildfires.
美国西部的干旱状况刺激了水的供应、伤害了农作物种植，也加快了野外火宰的扩散。
In the past, pesticides made great contribution to crop production in the world while performed some negative effects on environment.
农药曾经为世界农作物生产作出过巨大贡献，但也对环境造成了一些负面效应。
At the same time adverse and extreme weather conditions can jeopardise rice crop production, which feeds more than half the world's population.
与此同时，不利和极端的天气条件会危及稻谷这一供养着世界一半以上人口的作物的生产。
The most surprising finding, Lobell says, was how widely temperature trends varied by region and how dramatically they affected crop production.
罗贝尔说，最让我们震惊的是不同地区温度趋势变化的巨大差异，以及温度趋势对作物产量的巨大影响。
Chilling injury is an important natural disaster in agricultural production, seriously affected crop production and geographical distribution.
低温冷害是农业生产中一种重要的自然灾害，严重影响作物产量和地域性分布。
A crop, such as winter rye or clover, planted between periods of regular crop production to prevent soil erosion and provide humus or nitrogen.
在常规农作物生长间期内种植的农作物，比如冬麦或三叶草，以预防土壤侵蚀并能提供腐殖质和氮。
Clearing of land for feed crop production and expansion of pastures for livestock production has been one of the driving forces behind deforestation.
为饲料作物生产清理开垦土地，为畜牧生产扩大牧场，成为毁林的动力之一。
Clearing of land for feed crop production and expansion of pastures for livestock production has been one of the driving forces behind deforestation.
为饲料作物生产清理开垦土地，为畜牧生产扩大牧场，成为毁林的动力之一。
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