In a dusty field in Kitui, eastern Kenya, farmers are being taught how to construct small, semi-circular barriers of earth that control the flow of water, slowing its run-off.

在肯尼亚东部的基图伊，尘土弥漫的田地里，农民们正学着建造小型的环形土坝，以此控制水量、减缓水分流失。

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But it is the idea of using biochar to remove carbon dioxide from the atmosphere on a semi-permanent basis that has caused people outside the field of agriculture to take notice of the stuff.

但是用生物炭半永久性地消除大气中的二氧化碳，引起了农业界之外人们的关注。

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Field experiments was used to study the change of soil N2O discharge flux in the northwestern arid and semi-arid areas.

田间试验研究了西北干旱半干旱地区地膜覆盖对土壤中n 2o排放通量变化的影响。

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Before me opens up, in the semi-darkness, a field of rubbish and stones and elephant grass.

NEWYORKER: Baptizing the Gun

The 28-year-old collapsed on the field during the Confederations Cup semi-final against Colombia at Lyon on 26 June.

BBC: Marc-Vivien Foe

Dobriskey was only eighth at the bell in the 1500m semi-final but moved through the field to finish third.

BBC: Dobriskey through to 1500m final