Alkaline soils derived from chalk or limestone.

从白垩或者石灰石中得到的碱土。

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The incidence of silicosis was compared in the workers exposed to either silica dust or limestone dust in a steel casting factory.

调查某铸钢分厂在采用型砂材料石英砂或石灰石砂工人矽肺患病情况。

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Minerals can be obtained to be added to your soil from ground up rock or limestone to create the nutrition required to sustain healthy plant life.

矿物质可用碾碎的矿石和石灰岩加入到土壤中而获得所需的养分，从而支持植物的健康。

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Usually this layer is a soluble carbonate rock, such as limestone or its purer form, chalk.

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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

Geologists have long known that when peridotite is exposed to the air it can react quickly with carbon dioxide to form carbonates like limestone or marble.

ECONOMIST: Greenhouse gases