Kinetic sorption characteristics of hexachlorobenzene (HCB) on Huangni soil surfaces were investigated by using the kinetic experimental methods.
六氯苯在土壤表面的吸附在192h(8d)基本可达到表观平衡,其吸附的动力学过程可以用一级动力学方程、Elovich方程和双常数方程进行很好的拟合,其相关系数(r)在0。
The paper introduces a method of measuring technique and apparatus for carbon dioxide flux from known areas of soil surface in situ,which consists of tow parts.
该方法和装置可用于区域内、多地点、多样地(点)土壤表面二氧化碳通量的测定,具有便于携带、成本低、易操作,测定数据可靠、直接、快速等优点。
In this thesis,the effects of adding dose of isoproturon,soil moisture,pH value,nitrate and nitrite,chemical fertilizers(urea and KH_2PO_4),heavy metal ions and light sources on photodegradation of isoproturon on the soil surfaces have been studied.
本论文主要研究了异丙隆土壤表面光解的影响因素,包括异丙隆本身的添加剂量、土壤湿度、pH值、NO_3~-和NO_2~-、化肥(尿素和磷酸二氢钾)、重金属离子以及光源,并初步研究了其在土壤表面光解的产物,得到以下结论:1。
Material selection and technology optimization for mending dam concrete surface defect;
大坝混凝土表面缺陷修补材料选择及工艺优化
According to measured chloride ions concentration of water soluble in tidal estuary environment of the Qiantang River and chloride ions density of concrete surface of the seawall revetment,the correlation including the relationship of chloride ions conc.
根据对钱塘江河口感潮环境表层水体中的氯离子含量及其海塘护坡混凝土表面氯离子浓度的检测,分析了水体中氯离子含量及与距河口距离的关系、护坡混凝土表面氯离子浓度与距河口距离的关系及不同高度表面浓度的关系等。
The upper part of the soil.
表土土地、土壤表面的一层
A Study on Soil Contact Angle and Soil Surface Free Energy Properties;
土壤接触角及土壤表面能量特征的研究
The distance of the water table below the soil surface must be adjusted.
必须调整土壤表面以下水位的距离。
A NEW APPROACH FOR MODELLING THE VERTICAL STRESS DISTRIBUTION AT THE SOIL SURFACE
模拟土壤表面竖向应力分布的新方法
A loose mulch acts on the surface as an insulator.
疏松的覆盖物在土壤表面起了隔热的作用。
Temperature changes drastically in the first few centimeters above and below the surface of the soil.
土壤表面上下几厘米处的温度变化是大的。
Photochemical Transformation of Petroleum Pollutants on Soil Surface;
石油类污染物在土壤表面光化学转化的研究
"The smaller the soil particles, the greater is the surface area of the soil; the water holding capacity, the power of holding plant food and the tenacity of the soil depend on this surface area. "
土粒愈小，则土壤的表面积愈大。土壤的持水力、保肥力和土壤韧度都决定于这一表面积的大
To remove the surface layer of soil from(land.
去掉表土将土壤最上面的一层从（土地上）清除掉
a vertical section of soil from the ground surface to the parent rock.
从地表到母岩的土壤的纵剖面。
Both inorganic and organic surfaces constitute the soil adsorption complex.
无机和有机表面组成土壤吸附复合体。
Clay mineral composition and surface charge characteristics of red earth and yellow brown earth were studied.
本文研究了红壤与黄棕壤的粘粒矿物组成与土壤的表面电荷特征。
Clay minerals and surface chemical characteristics of soils developed under a palaeosol in lower West Mountain area of Beijing.
北京西山古土壤母质上发育的土壤之粘粒矿物与表面化学特性
Effect of Near-Surface Soil Hydrological Conditions on Soil Erosion and Nutrient Losses at Hillslopes
近地表土壤水文条件对坡面土壤侵蚀和氮、磷养分流失的影响研究
Sorption Mechanisms of a Nonionic Surfactant Onto Soils;
中性表面活性剂在土壤界面上的吸附机理研究
The results showed that the REEs contents in the C horizon the soils were the highest,but Ce was relatively concentrated in A horizon.
结果表明 ,土壤剖面层的底土层含量最高 ,但表土层铈相对富集 .
"Root hairs feed from the surface particles, therefore the internal surface area has a great influence on plant food in the soil. "
根毛从土粒表面吸收养分，所以，土壤的内表面积对土壤中的植物养分有很大影响。
We may have too large an internal surface area where the particles are too fine and the pore space may be filled up. Pore space depends on the size and arrangement of the particles.
如果土粒太小，土壤内表面积就会过大，致使土壤孔隙被阻塞。孔隙取决于土粒的大小与排列。