The continuous and reckless use of synthetic chemicals for the control of pests which pose a threat to agricultural crops and human health is proving to be counter-productive.

为控制害虫，人们持续且不计后果地使用人工合成化学品，对农作物和人类健康造成危害，事实证明会产生相反的效果。

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Saline soils, which have high concentrations of sodium chloride and other salts, limit plant growth, and research continues to focus on developing salt-tolerant varieties of agricultural crops.

盐碱地含有高浓度的氯化钠和其他盐类，限制了植物的生长，研究继续集中于开发耐盐的农作物品种。

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Rotate agricultural crops to prevent the sapping of nutrients.

不同的作物轮耕，以防止土壤养分枯竭。

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Melting snow provides water for rivers,electric power centers and agricultural crops.

VOA: special.2010.01.05

Agroecology examines the connection between agricultural crops and the environment.

VOA: special.2009.04.14

Officials in Liberia say tens of millions of caterpillars are destroying crops and polluting waterways in the country's agricultural centers.

VOA: special.2009.01.27

Australia has produced some of its biggest agricultural crops in times of greatest drought.

ECONOMIST: So long as it doesn��t cost too much

The West could help in supplying seeds for new agricultural crops and equipment for food processing.

CENTERFORSECURITYPOLICY: Center For Security Policy

Ozone in the lower atmosphere (troposphere) is regarded as a serious pollutant that can cause respiratory problems, and even damage masonry and agricultural crops.

BBC: London's clue to stubborn ozone levels