这意味着表层土壤几只含有少量长期成功耕作所必需的成分。
This means topsoil contains few of the ingredients needed for long-term successful farming.
由于浓度的增加，植物的再生长很少，导致侵蚀增加，使得肥沃的表层土壤减少，再生长更少。
Because of this increased concentration, regrowth of plants is minimal, leading to increased erosion, which leads to a decrease in the fertile topsoil, leading to even less regrowth.
降水往往会把细小的粘土颗粒转移到土壤的最微小的空隙中，使这些空隙变得封闭，从而形成了一种几乎不允许任何水分渗透下来的表层土壤。
The impact of raindrops on the loose soil tends to transfer fine clay particles into the tiniest soil spaces, sealing them and producing a surface that allows very little water penetration.
然而，耕地被认为是对表层土壤造成严重损害的罪魁祸首，因为它清除了那些保护土壤不被吹走或冲走的植物。
However, plowing is blamed for causing severe damage to top soil by removing the plants that protect soil from being blown or washed away.
雨水冲走表层土壤会造成环境破坏。
This causes environmental damage when the topsoil is washed away by the rains.
表层土壤已差不多完全给冲走了。
无常的降水和表层土壤的流失都使土地逐渐减产。
Irregular rainfall and loss of topsoil means that the land produces less than before.
表层土壤年总热通量为-0。
表层土壤和亚表层的变化规律基本一致。
表明长安区表层土壤已出现重金属污染。
如果要提取水，每吨(表层土壤)含水量大约为一夸脱。
The average amount of water reported, if we were to extract it, is about a quart of water per ton (of surface soil).
在澳大利亚把表层土壤作垄，果树栽在垄上。
In Australia, a shallow soil is scraped into ridges on which trees are planted.
表层土壤要冲掉了。
评价包头市郊区农用地表层土壤重金属锌环境质量。
The research aimed to evaluate the environmental quality of heavy metal Zn in the surface soil of the agricultural land in Baotou suburb.
飘泼大雨能很快地冲走那里的平坦开阔的表层土壤。
Heavy rain can quickly wash away the rich top soil on flat, open land.
在洪水泛滥时，大量表层土壤被冲刷到承受的水流中。
Under flood conditions, great amounts of topsoil are washed to receiving streams.
他们用石头建起堤坝，以免雨水流失，并防止珍贵的表层土壤被雨水冲走。
They built small DAMS made of stones to stem rain run-off and to prevent precious topsoil from being washed away.
从不同土壤提取的表层土壤应分开储存，并用同一区域的土壤进行更换。
Topsoil from different soil types shall be stockpiled separately and replaced in the same areas from which they were taken.
用热平衡法研究两种杨树防护林减少土壤蒸发及田间表层土壤减盐作用。
By adopting heat equilibrium method, the paper studies the function of the two kinds of shelterbelts to decrease evaporation and saltness of surface soil in the farmland.
在明永，泛滥的河水冲走了土地的表层土壤，而且还直接导致了山洪和泥石流的频发。
In Mingyong, surging meltwater has carried away topsoil; elsewhere, excess runoff has been blamed for more frequent flooding and landslides.
三个林型表层土壤全氮含量季节变化规律明显不同，总体变化幅度都不大。
Total nitrogen contents of surface soil in three forest types changed with seasons distinctly, and overall extents were not big.
表层土壤的总有机碳、活性碳、缓效性碳和惰效性碳含量都明显大于下层。
The contents of soil organic carbon, active carbon, slow carbon and resistant carbon is more in the surface soil than subsoil.
对定西黄绵土多年苜蓿地与传统耕地的表层土壤理化性质进行了比较研究。
The top soil properties of Huangmian soil under lucerne grown for many years were compared with those of soil under conventional tillage in Dingxi.
秸秆覆盖、中耕锄划、调控表层土壤根系分布等可作为减少土壤蒸发的有效措施。
Straw mulching, cultivating and hoeing, regulating the root distribution in the topsoil are effective measures to reduce the soil evaporation.
布希柏格教授说，移除表层土壤可以保证土地的使用安全，但这取决于放射性物质渗入的深度。
Professor Bushberg says removing the topsoil might make the land safe for use. But it depends on the depth of the radioactive material.
以人工降雨的方法，对巢湖边旱作表层土壤在降雨后所产生的磷迁移过程进行了研究。
The phosphorus transport in the crop soil within Liuchahe watershed was studied with rainfall simulation method.
总体而言，来水中的磷、有机质和速效铁以沿程逐渐降低的方式分布于湿地表层土壤中。
TP, rapid available phosphorus, organic content and rapid available iron were gradually decreased in the top soil layer of wetland along the flow path.
总体而言，来水中的磷、有机质和速效铁以沿程逐渐降低的方式分布于湿地表层土壤中。
TP, rapid available phosphorus, organic content and rapid available iron were gradually decreased in the top soil layer of wetland along the flow path.
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