Among them: flowerpots whose color warns when the soil is drying out, blackboards using water instead of chalk that could be erased by a pulse of heat, and even cars that change color in the rain.

其中包括：当土壤正在变干之时，凭颜色发出警告的花盆；用水笔代替粉笔写字，用热脉冲可以擦除字迹的黑板；甚至包括在雨中变化颜色的汽车。

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In 1847 the farm's founder, Sir John Lawes, described its soil as a heavy loam resting on chalk and capable of producing good wheat when well manured.

1847年农场的创办人，劳斯爵士，将这里的土壤描述为一条狭小田地上面能产出很多粮食的田地，如果好好施肥能产出更多。

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First, it poured industrial quantities of lime (pulverised limestone or chalk) onto the soil to reduce levels of acidity.

首先，撒入大量石灰(石灰或是石粉)来降低土壤酸性。

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First, it poured industrial quantities of lime (pulverised limestone or chalk) onto the soil to reduce levels of acidity.

ECONOMIST: Brazilian agriculture

The soil consists of a chalk subsoil, topped by a covering of rubble that is made up of sand, lignite, marl, loam and clay.

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