表土

薄薄的一层表土被冲走了。

A thin layer of topsoil was swept away .

天津地区表土PAHs含量的多尺度空间相关性

Multi-scale spatial characteristics of topsoil PAHs in Tianjin area

在美国西部黄土区和冲积河谷里，表土和底土一般是容易破碎的。

In loessal regions and alluvial valley fills of the western United states , both surface soil and subsoil are commonly friable .

神农架北坡表土常见花粉的R值研究

A Study on the Representation of Common Pollens in Soils on the Northern Slope of Shennongjia Mountains

赤红壤表土育苗施石灰后施P、Zn、B对巨桉苗生长的影响

Effect of Lime , P , Zn and B Nutrients on Growth of Eucalyptus grandis Seedlings on Latored Surface Soil

天津表土PAHs的空间主成分与污染源分析

Spatial PCA and Pollutant Sources of Topsoil PAHs in Tianjin Area

天津表土PAHs不同组分和土壤理化参数的多尺度空间关系

Multi-scale Spatial Relationship of PAHs Compounds and Soil Properties in Tianjin Area

根据表土孢粉分析和植被样方调查的比较研究，获得了神农架北坡表土常见花粉的R值。

The representation of common pollens in soils on the northern slope of Shennongjia mountains area is studied in the light of sporo pollen analysis and plantation sample investigation .

表土花粉组合与植物群落间有较大的相似性，相似系数（CC）大于50%。

The similarity between pollen assemblage and plant community was good and coefficient of similarity was more than 50 % .

滇西和黔中表土中~7Be与~（137）Cs分布特征对比研究

A Comparative Study on Distribution of ~ 7Be and ~ ( 137 ) Cs in the Surface Soils in the Western Yunnan and the Central Guizhou Provinces

采用聚类分析、方差分析和多重比较等统计方法，结合空间分异分析研究了天津表土中多环芳烃（PAHs）含量的多元和空间分布特征。

Cluster analysis , anova , and multiple comparison were used to investigate the spatial distribution pattern of PAHs in the surface soils of Tianjin .

土壤为中国农业大学科学同试验田的0～10cm表土。

Soil from the test-field of CAU was the topsoil of 0 ~ 10cm depth .

设施栽培土壤养分富集主要在0~10cm土层，且集中在0~2cm的表土层，其中以EC值、有效S、有效K及有效Mn在0~2cm表土层的相对富集量最多。

Enriched nutrients were distributed mainly in the 0 ~ 10 cm layer and concentrated in 0 ~ 2 cm top surface , especially for EC value , available S , K and Mn .

在所有采点，尘土样品的质量磁化率（X）与饱和等温剩磁（SIRM）均高于同一采样点的表土样品。

The mass susceptibility and saturation isothermal remanent magnetism ( SIRM ) of dust samples are higher than that of topsoil on each site .

在土壤仅100倍的表土有少量积累为0.81mg／kg。

There is a little accumulation ( 0.81mg / kg ) inthe surface soil which concentration is 100 times .

本文用荷兰8种表土测试不同温度下0.01molL~（-1）CaCl2提取液和淋滤液中N素各形态。

Eight Dutch surface soils were used in this study to analyse different N fractions in 0.01 molL ~ ( - 1 ) CaCl_2 extracts and percolates at different temperatures .

文章应用多种多元统计分析方法，分析了天津表土16种PAHs之间的关系。

This paper discussed the relationship among 16 prior polycyclic aromatic hydrocarbons ( PAHs ) contained in topsoil in Tianjin area based on various methods of multivariate statistics analysis .

与表土相比，气溶胶的粒度小得多，具有较低的δ13C值和较高的δ18O值。

Comparing with surface soil , aerosols had much smaller particle size and lower δ 13C value and higher δ 18O value .

地壳由半无限大的基岩上一层厚度为H的表土层组成，入射地震波为垂直的SH波，产生水平地面运动。

The crust is constituted by the rock and a surface layer of soil with depth H over it . The incident seismic wave is a vertical SH shear wave to cause horizontal ground motion .

结果表明，洛阳工业区表土中Pb、Zn、Cu、Cr和Fe的含量均高于郊区农用地土壤，Mn的含量稍低于郊区土壤。

The average concentrations of Pb , Zn , Cu , Cr , Fe and Mn in industrial districts were higher than those in suburb cropland , but the concentration of Mn was less than that in suburb cropland .

椰子的根系呈喇叭型分布，在表层土壤的分布范围小，深层土壤分布范围广，而菠萝根系主要分布在0～30cm的表土中。

The roots of coconuts concentrated in deeper soils , but the roots of pineapples mainly concentrated in 0-30 cm surface soils .

深度在40cm以上的表土，腐殖酸总量及各组分含量都随着撂荒年限的增长呈递增趋势。

The contents of humus acid and its composition decreased with depth , and increased with the increasing of years .

黄绵土表土水稳性大团聚体（0.25mm）粒径越大，其中的有机碳含量越高。

The larger the water stable macroaggregates , the higher organic carbon content in them .

非磁滞剩磁（ARM）、磁滞参数等与粒度相关的参数表明，尘土中的磁性颗粒较表土粗，尘土样品以多畴亚铁磁性颗粒为主，表土以准单畴颗粒为主。

The results of anhysteretic remanent magnetism ( ARM ) and hysteresis parameters , which could be used as an indicator of the magnetic grain size , indicate that the size of magnetic particles of dust samples may be bigger than that of topsoil .

中国东北样带（NECT）东部森林区的植被与表土花粉的定量关系

Study of Quantitative Relationships Between Vegetation and Pollen in Surface Samples in the Eastern Forest Area of Northeast China Transect

认为当表土深度超过200m时，以安装竖向可缩装置的“让”型井壁结构为好。

The results of study and analysis indicate that priority is given to the " reducible " type shaft lining structure while the deep alluvium depth is more than 200 m.

祁东矿表土240～280m，为一特厚粘土层段。

There is a special thick clay of about 240 ~ 280 m under the topsoil of Qidong Coal Mine .

川西平原属沉积平原，不到2m厚的表土下面全是沙卵石，沙卵石厚度达二、三十米。

Chuanxi plain belongs to sedimentary plain , where there is sand-gravel mixture under the surface soil in less than two meters in thickness , the thickness of sand-gravel mixture is 20m ~ 30m ;

在江西表土施用KCl肥料后，用室内模拟酸雨的土柱实验，研究酸雨对不同土层酸度及K+淋失的影响。

The influence of simulated acid rain on acidity and K + release of different soil layers of red soil from Jiangxi was investigated in the lab when surface soil was mixed with KCl .

由于粉尘源区表土碳酸盐含量和δ13C值均具有区域特征，因此利用大气粉尘的碳酸盐含量和δ13C值示踪不同的源区是可能的。

It is therefore possible to identify dust sources with carbonate content and δ ~ ( 13 ) C value of the dust aerosols due to their significant regional differences in dust source regions of China .