To improve clay soils, mix in garden waste or other organic matter and turn the soil deeply in the fall.

VOA: special.2009.03.10

In Democracy in America there's that famous passage, or passages, when Tocqueville crosses the Ohio River, from Ohio into Kentucky, from free soil into slave soil, free state into a slave state.

在托克维尔跨越俄亥俄河,从俄亥俄进入到肯塔基州,从自由之所走向奴役之地的那段游历中,为《美国民主》贡献了数段名言

耶鲁公开课 - 美国内战与重建课程节选

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

VOA: special.2010.01.12

The system is designed to identify the presence of contaminants like soil or animal waste on fresh produce.

VOA: special.2011.06.07

If your soil is very dry, you can add peat or compost, which returns nutrients to the soil.

VOA: special.2010.06.15

Other controls include turning over the soil, pulling the weeds or covering them with mulch made of wood, garden waste or other material.

VOA: special.2010.08.10

He says there is likely more risk from lead dust on plants or from playing in the soil than from the plant itself.

VOA: special.2009.06.09

This container should be deep enough to hold at least three centimeters of soil or more.

VOA: special.2009.04.28

If a test finds that soil has too much lead, you might be advised to remove the soil or cover it with sod grass.

VOA: special.2009.06.09

Corn harvests remain small. The researchers say farming methods in Sub-Saharan Africa need to improve or else poor quality soil will increase rural poverty.

VOA: special.2009.07.28

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

VOA: special.2009.06.30

Other controls include turning over the soil, pulling the weeds by hand or covering them with mulch made from wood, garden waste or other material.

VOA: special.2009.05.26

But it can also increase the risk of soil erosion by rain or wind.

VOA: special.2010.09.28

Make sure the soil is not too wet or the seeds could develop poorly.

VOA: special.2009.03.24

The test results of the piece of soil or waste material were more promising.

VOA: special.2011.03.15

Nature plants the seeds through birds or animals on top of the soil.

VOA: special.2010.07.13

They prepare the soil for planting with their hands or simple tools.

VOA: special.2009.04.14

Ervin says that means some farmers have returned to using soil-disturbing tillage or more toxic herbicides to control weeds.

VOA: standard.2010.04.15

There is concern that some detainees may be transferred to U.S.soil for trials, continued imprisonment or even release.

VOA: standard.2009.05.20

But Brennan told NBC that all terrorists arrested on U.S.soil are tried in civilian court, whether or not they are American citizens.

VOA: standard.2010.02.07

he said,"The presence of PKK forces on Iraqi soil has harmed villagers from over 500 Kurdish town and the PKK must either lay down its arms or leave Iraq."

VOA: standard.2009.03.23

Engineers have found that wetlands, grassy fields and soil or sand filters can take in stormwater with different levels of pollution and release water with a relatively constant cleanliness.

VOA: standard.2010.08.04

Such tests,he adds, may also be aimed at frightening other countries in the region, like the Gulf States, or southern European nations that have U.S.or other Western bases on their soil,and might be involved in the logistics of an eventual attack.

VOA: standard.2009.12.18