However, plowing is blamed for causing severe damage to top soil by removing the plants that protect soil from being blown or washed away.
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。
For some nutrients like phosphorous which are in the top soil, we want shallow roots.
有些养料位于土壤表层，比如磷，那么我们就需要较。
Theroot infection rate was higher in top soil than in subsurface soil in Ash and Larch plantation.
水曲柳和落叶松林分表层的侵染率高于亚表层的侵染率。
Jonathan Lynch: For some nutrients like phosphorous which are in the top soil, we want shallow roots.
纳森•林奇：为有效吸取表土磷等营养物，浅根更适合。
207 top soil samples were collected from Hebei province and the contents of heptachlor were measured.
在河北省境内采集207个表层土壤样品，测定其中的七氯含量。
A certain large gently inclined cut slope was destructed by its rock slope failure due to top soil sliding.
某大型缓倾陡节理路堑边坡，在上部薄表土滑动作用下岩质坡体倾倒破坏。
In the 1930s, the United States was hit with the Dust Bowl, with winds that carried off the nutritious top soil.
1930年代，美国曾受沙尘冲击，风沙带走了肥沃的表土。
Two special factors which influence the accuracy of calibration for top soil have been discussed also in this paper.
同时也讨论了影响表层测定精度的两个特殊因素。
When you get ready to fill your hole with top soil in your flower bed landscaping project, be sure to use good loam.
当你准备给你补洞土顶花坛美化你项目一定要利用好壤土。
The high precision data of S concentration in top soil is an important proxy to estimate the sulphur loss in top soil.
准确测定土壤中有效硫的含量，对土壤硫元素是否缺乏的判定及合理施用硫肥具有重要的意义。
Worst of all, the physical structure changes if the top soil erodes, making it harder for the land to retain water or fertiliser.
最糟糕的是土壤物理结构的变化，如果表层土壤侵蚀，土壤更难保水保肥。
Under the action of wind, forced convection of air above ground and water evaporation of top soil layer will be greatly enhanced.
在风的作用下，地表上部空气的强制对流和表土层中的水分蒸发大大增强，对冻土层的热状况产生重要的影响。
Some gardeners prepare an area by removing the existing top soil and grass. This can be done with a shovel, hoe or sod-cutter machine.
一些园艺爱好者在准备种植场地时会使用铲子，锄头或割草器来移除已有的表土和青草。
Each year, about 900,000 cubic meters of top soil are lost in the country, according to the U. S. Agency for International Development (USAID).
据美国国际开发署(USAID)说，海地每年约有90万立方米的表层土流失。
The top soil properties of Huangmian soil under lucerne grown for many years were compared with those of soil under conventional tillage in Dingxi.
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。
You can purchase an appropriate pre-mix soil at your local garden center or you can create your own mix using top soil compost and organic material.
你可以适当购买预混合园林中心或当地土壤你可以创造自己运用组合表土、堆肥和有机物质。
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。
The protection of top soil layer has utter most importance in protection of grassland resources and ecosystem, and in prevention of sandy desertification.
保护地表土层对于保护草地资源和生态环境，以及沙漠化防治具有极端重要性。
In particular, they should be forced to accelerate her visionary campaign to replant indigenous trees along river Banks and ravines where the continent's life-giving top soil is being swept away.
尤其是，他们应该迫切地去推进其高瞻远嘱的沿河岸和沟壑重植本土树木的运动，在那些地方这块大陆哺育生命的表层土壤正在快速地流失。
The volume quality of top soil is increased and the soil porosity is reduced owing to compaction, so water flow downward difficultly and the amount of water vertical infiltration is reduced.
由于压实，增加了表层土壤的体积质量，降低了土壤孔隙度，水不易向下运动。
A top dressing of fertilizer should be added to improve growth as mint impoverishes the soil quickly.
应施顶肥以促进生长，因为薄荷会使土壤迅速变得贫瘠。
Potting soil, mixed with ingredients to lighten it, is put on top.
混合了减轻材料的盆栽土壤放在顶层。
On top of that, he published a cool paper showing that soil microbes - "ultra-bugs" - can use antibiotic drugs as their sole source of food.
最重要的是，丘奇研究发现，土壤微生物——“超级臭虫”——可以将抗菌药物作为它们唯一的食物来源。
If your soil does not contain a lot of sand, add a 3-inch layer of sand on top of the soil.
如果土壤含沙量不够，则需在土壤表面覆盖3英尺的细沙。
As the glaciers advanced, they scraped off the top layer of rock and soil on land and then released minerals and nutrients into the ocean as they retreated.
在冰川进展过程中，它们剥脱了陆地表面的岩石和土壤，然后在撤退时将矿物质和营养物质释放到海洋中。
As the glaciers advanced, they scraped off the top layer of rock and soil on land and then released minerals and nutrients into the ocean as they retreated.
在冰川进展过程中，它们剥脱了陆地表面的岩石和土壤，然后在撤退时将矿物质和营养物质释放到海洋中。
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