In order that the crops in open field could survive safely the winter frost prevention operation is of Paramount importance.

为了使这些大田作物能够安全越冬，防霜作业具有极端重要意义。

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Parked alongside his onion fields, Bob Hale can prop open a laptop and read his email or, with just a keystroke, check the moisture of his crops.

鲍布在洋葱地旁停下车，打开笔记本电脑，轻击按键，浏览他的电子邮件，核查作物的湿度。

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Could this open the way to giving crops a helping hand against disease?

这是否可以开辟一条途径，有效地帮助农作物抵抗疾病呢？

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Weeding,seeding and watering requires at least as much work as crops grown in the open air.

VOA: special.2009.12.22

Author, activist and agriculture expert Michael Pollan has been stumping for an open source movement for GE crops for the better portion of a decade.

FORBES: Open Sourcing Food Security

Scientists at Rothamsted Research in Hertfordshire, working on a kind of wheat which they say would need less pesticide and bring other benefits have written an open letter to protestors who are determined to try to close down the site where the crops are going to be grown.

BBC: GM researcher: 'Please don't destroy our crop'