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。
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。
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。
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。
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。
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。
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。
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。
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。
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。
If a large area of land is cleared of trees and bushes and is then badly treated by the farmer, the rain and winds may gradually wash away, or blow away, much of the fertile top-soil.
如果把一大片土地的树木全部砍伐掉，再加之农民耕作不当的话，那么风吹雨打就会逐渐地把大部分表层的肥 沃土壤吹走或冲掉。
If a large area of land is cleared of trees and bushes and is then badly treated by the farmer, the rain and winds may gradually wash away, or blow away, much of the fertile top-soil.
如果把一大片土地的树木全部砍伐掉，再加之农民耕作不当的话，那么风吹雨打就会逐渐地把大部分表层的肥 沃土壤吹走或冲掉。
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