Natural soil fertility is dropping in many areas because of continuous industrial fertiliser and pesticide use, while the growth of algae is increasing in lakes because of the fertiliser run-off.

在很多地区，由于工业化肥和农药的持续使用，导致自然土壤的肥力正在下降，然而化肥的流入却导致湖泊中藻类生长得越来越快。

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Use sod instead of grass seed and take advantage of natural soil erosion inhibitors like straw and compost.

而使用草皮草种，并利用秸秆等自然土壤侵蚀抑制剂和堆肥的优势。

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Natural soil thermoluminescence survey whose repeatability is very good can be used in exploring deep deposit.

土壤天然热释光法是一种能达到攻深找盲的方法，而且它的异常重复性很好。

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This natural recycling returns nutrients to the soil.

VOA: special.2009.06.23

The way these things work, when you are engaged in agriculture, it's natural to go first to that soil, to that patch of land which is known to be likely to produce the best land, the most fertile, the best product, the most fertile land there is.

这一方式是这样运作的,当你从事农业,你自然而然的会首先关注土壤因素,去找出已知土地中最为肥沃的那一块,土地越肥沃,产量越高,就越追求更为肥沃的土地

耶鲁公开课 - 古希腊历史简介课程节选

He doesn't accept the view, common among the utopians, that natural endowments like soil and water explain why rich nations are 50 times as prosperous as poor ones.

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The loss of the springs brought with it a loss of the natural filtration of soil and sand, however, so the Maya built their own primitive filtration systems, forcing their rainwater runoff through boxes of sand, the researchers found.

MSN: Sustainable tech saw the ancient Maya through drought

The entire village is washed in rich sunburnt shades of ochre, (a natural dye taken from the local soil, no other color is allowed for buildings).

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