They help decompose organic matter, and their burrows keep soil drained and ventilated.

它们帮助分解有机物，其洞穴还能使土壤保持排水和通风。

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In agricultural ecosystem, they supply nutrients for crops with degraded plant residues and keep soil characteristics which are necessary to plant growth.

在农业生态系统中，土壤微生物通过降解植物残体为植物提供营养，同时维持植物生产所需的土壤性质。

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Keep the soil moist. That way, the seedling will flourish.

保持土壤湿润,那样小苗就会茁壮成长。

《柯林斯英汉双解大词典》

So keep the garden watered. Moist soil absorbs more heat than loose,dry soil covered with mulch or vegetation.

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Farmers may keep the remains of maize or other crops on top of the soil.

VOA: special.2009.06.30

It helps keep the soil from getting dry, so it reduces the need for watering.

VOA: special.2009.06.30

The sheets keep the soil moist and warm, and also stop weeds growing.

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The soil cannot keep them anymore.

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