topsoil
This topsoil tends to wash away.
表层土壤要冲掉了。
Do you know what topsoil is made of?
你知道表土是由什么构成的吗?
Heavy rains washed the topsoil away.
大雨把表层土冲蚀掉了
Erosion has dissolved acres of topsoil.
侵蚀作用已使大量表土层流失。
This topsoil tends to wash away .
表层土壤要冲掉了。
The topsoil has been almost completely washed away.
表层土壤已差不多完全给冲走了。
Here a dry spell meant parched crops,a rainy spell,loss of topsoil.
过去这里，一有干旱庄稼就会枯死，一下雨浮土就会流失。
Here a dry spell meant parched crops, a rainy spell, loss of topsoil.
过去这里，一有干旱庄稼就会枯死，一下雨浮土就会流失。
Worse still, the storm washed the topsoil from the hillside.
更糟的是,暴风雨把山坡上的表土冲走了。
In ABC soil,the uppermost zone of soil,containing humus;topsoil.
淋溶层在ABC层土壤中最上面的一层，含有腐殖土;顶层土壤
Wind eroded the loose topsoil.
风侵蚀了稀松的表土
In ABC soil, the uppermost zone of soil, containing humus; topsoil.
淋溶层在ABC层土壤中最上面的一层，含有腐殖土；顶层土壤
When all the topsoil is gone, nothing remains but worthless desert.
当表土层都被冲走后，就只留下沙漠了。
In containers use a planting mix combined with topsoil.
在使用容器种植结构相结合的表土.
On the wide level acres of the valley the topsoil lay deep and fertile.
在山谷中广袤平坦的大地上，覆盖着厚实肥沃的土层。
Worse still, the annual torrential rains washed the topsoil from the hillside.
更糟的是，每年都有暴雨把浮土从山坡上冲走。
The fragile land quickly lost its topsoil and became nothing but sand and dust.
那单薄的土地很快就失去了表土，成为沙粒和尘埃。
Worse still,the annual torrential rains washed the topsoil from the hillside.
更糟的是，每年都有暴雨把浮土从山坡上冲走。
Villagers may be persuaded to build terraces to stop topsoil running off.
村民会被劝说建造更多的梯田好让表层土不被冲刷掉。
Loess is easy borne by the wind and may be carried long distances before it falls to earth and becomes topsoil.
黄土易被风刮起并带至远处方才落下成为表土层。
It would appear that the inputs are insufficient to offset the mobilization and leaching of calcium from the topsoil.
钙的转入量看来不足以补偿从表土中活化和淋失的钙。
Under flood conditions, great amounts of topsoil are washed to receiving streams.
在洪水泛滥时，大量表层土壤被冲刷到承受的水流中。
Located on a prehistoric lake bed, which accumulated nutrient-rich sediment, contributing to the fertile topsoil.
农场建立在史前湖床之上,这里积聚了富含营养的沉积物,形成了肥沃的表层土。
His clothes are so dirty that he shakes them out every now and then and sells topsoil.
他的衣服那么脏,每隔一阵子他抖搂抖搂就能卖肥土了。
When the black topsoil was all washed away, farmers moved westward and started new plantations.
当表层黑土全部被冲走之后，农民们就向西部转移，建立新的种植园。
If the topsoil is taken away by erosion, plants can no longer grow in the soil left behind.
如果因水土流失而冲掉了表土，植物不能再在留下的土壤中生长。
In many countries the loss of productive topsoil has contributed to growing food deficits.
在许多国家里，生产性表土的流失已导致日益严重的粮食短缺。
According to scientists, it takes nature 500 years to create an inch of topsoil.
根据科学家们的看法，自然界要用500年的时间才能创造一英寸的表层土壤。
Severe flooding can sweep away not just crops growing in the fields, but also the nutrient-rich topsoil and some subsoil.
严重的洪水不仅会冲走长在田里的庄稼，而且也会冲走富含养分的表土和一些底土。
The auxiliary shaft topsoil adopted ordinary construction and drainages in hygrometric well.
屯留煤矿副井井筒表土段采用普通法施工,利用井外降水井疏干降水。
Topsoil is polluted severely and borderland is lighter in heartland of polluted crude oil.
在原油污染中心地带，表层土壤受污染最重，边缘地带稍轻；
Dust storms occur when intense grazing strips pastureland of new growth, leaving the topsoil vulnerable to winds.
当密集的放牧导致新长好的牧草被啃光，让地表土容易被风刮走，沙尘暴就发生了。
On average, the planet has little more than 3 feet of topsoil spread over its surface.
平均情况下，覆盖着地球的表土层的厚度小于3英尺。
Effect of nutrient management on selected topsoil characteristics of a basalt derived Ferralsol in Dak lak ,Vietnam.
表5 养分管理对达拉克(Daklak)一种玄武岩发育的铁铝土基本些表土层性质的影响 Table 5.
Topsoil is being lost to erosion, and arable land is being lost to desert, to salinization, and to urbanization.
表层土因为侵蚀而正在失去，可耕种的土地正在变成沙漠，被盐化，被城市化。
A chisel plow, meanwhile, only fractures the topsoil and preserves more surface residue.
用凿犁耕田则只会松开表土，保留较多的作物残株。
A planting experiment showed that planting Suaeda salsa decreased salt content in the topsoil effectively,an...
研究证明碱蓬是一种耐盐能力很强的盐生植物,对滨海盐渍土具有显著的改良作用。
When digging a hole for planting, one should put topsoil and subsoil in two different sides of the hole.
在挖栽植坑时，应将表土和底土分别放在坑的两侧。
However, small children are particularly exposed to metal-rich topsoil in playgrounds and gardens.
然而小孩在操场或花园中玩耍特别容易接触到富含金属元素的表层土壤。
So the topsoil is bits of rock mixed with things that are once alive. These things in the topsoil that were once alive are called humus.
可见，土壤是石粒和曾经是活体的物质的混合物。表土中这种曾是活体的东西叫做"腐殖质"。
A very black topsoil, rich in humus, typical of cool to temperate semiarid regions, such as the grasslands of European Russia.
黑钙土含丰富腐殖质的一种很黑的地表土，产于俄罗斯欧洲部分的草原地区等干旱温凉地带
In the absence of successful efforts to stem the loss of topsoil, the social effeets of erosion will probably first be seen in Africa.
在控制表土流失的努力缺乏成效的情况下，土壤侵蚀的社会影响将可能首先出现在非洲。
The activities are high in the topsoil and low in the subsoil, decrease from rhizoplane soil to root-free soil for all three enzymes.
从表层土向下,由根表土向外,碳矿化速率及其相关的各种酶活性均呈下降趋势。
In the absence of successful efforts to stem the loss of topsoil, the social effects of erosion will probably first be seen in Africa.
在控制表土流失的努力缺乏成效的情况下,土壤侵蚀的社会影响将可能首先出现在非洲。
Brother Tian said that his familys ploughing efforts turned up only dry soil, and the topsoil in the fields was easily blown away by the wind.
田师兄说,翻地都只翻出乾土来,田里的表土一见风就四处飞扬。
By protecting the topsoil and reducing fertilizer use, conservation agriculture can help in the fight against global warming.
等一下,还有呢!通过保护表层土和减少化肥施用量,保护性农业能够在与全球变暖的斗争中发挥作用。
Thus the farmer is helping nature rebuild the topsoil that holds the rain, resists the wind and provides food for growing plants.
因此，农民是协助大自然重建能够存蓄雨水、抵抗风力和滋养各种植物的表面土壤。
A very black topsoil,rich in humus,typical of cool to temperate semiarid regions,such as the grasslands of European Russia.
黑钙土含丰富腐殖质的一种很黑的地表土，产于俄罗斯欧洲部分的草原地区等干旱温凉地带
The concentration of Cr6+ was higher in topsoil and Hg2+ in upper soil, but the distribution of Pb2+ in soil showed no apparent trend.
Cr6+在土壤表层分布浓度较高,Hg2+在近地表层浓度较高,而Pb2+在土层上的分布没有明显的规律。
Loss of topsoil by erosion and a reduction in soil fertility by not replacing nutrients, turn a renewable resource into a non-renewable one.
侵蚀造成的表土流失以及不补充养分造成的土壤肥力下降使一种可再生资源变成不可再生的资源。