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

So, you must imagine these are successive kings who are being buried in this, what must have been, sacred soil.

因此,你必须设想他们是被埋葬在,这块圣土中的历任国王

耶鲁公开课 - 古希腊历史简介课程节选

In Mesopotamia they usually didn't need to because the richness of the soil and so on.

在美索不达米亚,由于土壤肥沃及其他因素,通常是不需要施肥的

耶鲁公开课 - 古希腊历史简介课程节选

He says the substances are especially dangerous because they travel through the air and stay in the atmosphere, soil and water.

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

If possible, in the year before you plant potatoes, plant a cover crop to improve the soil and the potato production.

VOA: special.2009.03.10

For the best results, carrots should be grown in sandy soil that does not hold water for a long time.

VOA: special.2009.02.24

The researchers say the nanodiamonds were all found in a level of soil thought to be about 13,000 years old.

VOA: special.2009.01.20

The water is collected through two holes and in the holes there is a siphon to carry it to the soil.

VOA: special.2010.07.13

Plantings in the wetlands help hold down the soil against the forces of erosion, like wind and water.

VOA: special.2009.10.06

To test the liquid, he placed a drop in the soil of a dying flower growing in a pot in the room.

VOA: special.2009.09.26

This is because diseases that infect beans can stay in the soil and infect the next bean crop.

VOA: special.2009.03.24

This will help dry the soil. In normal conditions, placing mulch around rose plants is a good idea.

VOA: special.2010.06.15

He and his team studied tree mass, dead wood and soil carbon in twenty-five mangrove ecosystems in the Indian and Pacific Oceans.

VOA: special.2011.05.10

Another recent study found that a single tillage does not harm yield or soil structure in land that is normally not tilled.

VOA: special.2010.09.28

Radioactive particles travel in the wind and get absorbed into soil with the help of rain and snow.

VOA: special.2011.03.29

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

The glacier left huge amounts of soil and rocks in what scientists call the Valley Heads Moraine.

VOA: special.2009.01.05

He says that is because the farmer used rich soil to produce the sod, so it might not do well in clay soils.

VOA: special.2009.07.07

"Those two earthquakes really opened up a lot of new research on something called soil liquefaction,in particular.

VOA: special.2011.03.28

They called it the Free Soil Party, because they believed in free land for free settlers.

VOA: special.2009.03.12

In the past, it often has been hard to get complete information about current soil conditions.

VOA: special.2009.01.20

No-till keeps carbon in the soil and avoids the release of heat-trapping gases from motorized equipment.

VOA: special.2010.09.28

Beets need the acidity level in the soil to be six to seven and a half.

VOA: special.2010.03.02

The study also noted that when tilled soil particles come in contact with air, soil organic matter is lost through the process of oxidation.

VOA: special.2010.09.28

They say the roots develop better. But Jeffrey Dinslage, president of Nature Hills Nursery in Omaha,Nebraska, points out that bare-root roses come without soil.

VOA: special.2010.06.15

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

They grow best in full sun and in loose soil that is not too wet.

VOA: special.2010.03.02

The groups want the governments to develop programs in seeds, soil health, policy and markets.

VOA: special.2009.11.17

They brought in more than fourteen thousand cubic meters of fertile soil from New Jersey to make it possible to grow trees and other plants.

VOA: special.2009.10.30