topsoil

A thin layer of topsoil was swept away .

薄薄的一层表土被冲走了。

Application of Blasting Technology to Inclined Topsoil Construction

爆破技术在斜井表土段施工中的应用

This causes environmental damage when the topsoil is washed away by the rains .

雨水冲走表层土壤会造成环境破坏。

The three environmental trends —— the shortage of fresh water , the loss of topsoil and the rising temperatures —— are making it increasingly hard to expand the world 's grain supply fast enough to keep up with demand .

当前的三大环境趋势——淡水资源短缺、表层土壤流失和气温不断上升——使得加速扩大粮食供应以跟上需求越来越难。

Article 32 The local people 's governments at and above the county level may demand units which occupy cultivated land to use the topsoil of the land occupied for use in the newly reclaimed land , poor land or other cultivated land for soil amelioration .

第三十二条县级以上地方人民政府可以要求占用耕地的单位将所占用耕地耕作层的土壤用于新开垦耕地、劣质地或者其他耕地的土壤改良。

Research of changing characteristics and control factors of farmland topsoil organic carbon in China

中国农田耕层土壤有机碳变化特征及控制因素

Study on Half Continuous Technology of Topsoil Stripping in Surface Mines

露天矿表土剥离半连续开采工艺研究

E City On Sustainable Management and Development of Heavy Metals in Urban Topsoil

论城市表层土壤中重金属的可持续管理与发展

Organic Carbon Density and Storage in Topsoil of Jiangsu and Spatial Analysis

江苏表层土壤有机碳密度和储量估算和空间分布分析

Study on Environmental Chemical Action of Cadmium in Topsoil in Chengdu

成都市表生土壤镉的环境化学行为研究

Changes of salt contents of topsoil under three cultivation patterns

不同栽培模式下耕层土壤盐分演变规律研究

The Present Ecological Environment and Measures for Improvement of Agricultural Topsoil in Shenyang

沈阳市农业土壤表层的生态环境现状及改善对策

Several heavy metals presented certain accumulation in the topsoil .

绝大多数重金属元素在土壤表层呈现出一定的累积。

Studies on the localized optimal estimation of calcium content of topsoil in China

中国土壤表层钙元素背景值的地域最佳估值研究

Study on the Fractal Characteristic of Topsoil Particle in Anhui Province Based on GIS

基于GIS的安徽省表层土壤颗粒分形特征研究

Long-term fertilization could significantly increase the N mineralization potential of topsoil .

长期施肥能显著增加耕层（0～20cm）土壤氮素矿化势值。

SCF can also improve topsoil temperature , especially in the seedling stage .

能提高耕层温度，尤其是在苗期。

Changes of soil nutrients occurred mainly in the topsoil .

这些变化主要发生在土壤表层。

Study on grouting mechanism and parameters in the depths of thick topsoil

立井壁后土层注浆加固机理及注浆参数研究

Study on the Spatial Correlation between Topsoil 's Infiltration Indexes of Farmland

农田土壤表层入渗指数的空间相关性研究

Ground vegetation as indicators of topsoil chemical properties in Dongguan , South China

东莞地表植被对表层土壤化学特性的指示作用

Topsoil is a valuable resource because it is difficult to produce in short time .

表层土壤是短时期内难以再生的宝贵资源。

Research of modern topsoil environment magnetics of Sanming City area , Fujian Province

福建省三明城区现代表土环境磁学研究

Construction Experience of Main Well Topsoil Layer Congelation in Zhangbei Coal Mine

张北煤矿主井表土层冻结施工技术经验

Topsoil Replacement Thickness of Roadbed with Large Moisture Content in Seasonal Variation Area

确定季冻区含水量大的地段路基换填厚度的研究

The Effects of Different Sowing Ways on the Topsoil Water and Physiological Characteristics of Winter Wheat

不同播种方式对耕层土壤水分及冬小麦生理特性的影响

Multivariate Statistics Analysis of PAHs in Topsoil of Tianjin Area

天津地区表层土壤多环芳烃的多元统计分析

Study on the Spacial Variability of Topsoil Heavy Metal of Dongguan City

东莞市土壤重金属含量的空间变异性研究

Farming practices have significant impacts on the physical and chemical properties of topsoil .

农业耕作活动对表层土壤物理性质影响明显。

Study on Water Deficit of the Topsoil over the Chinese Loess Plateau Mesa Region

中国黄土高原塬区表层土壤水分盈缺状况的研究