查询词典 infertile soil

Green-Ampt model can be applied in analyzing capillary water rise process of homogeneous soil. A laboratory experiment was conducted for capillary soil transport characteristics of homogeneous soil.

将Green-Ampt模型用于均质土壤毛管水上升过程分析中，通过室内土柱模拟试验，对均质土毛管水运动特性进行了研究。

The following results were obtained: 1. Several multi-pore materials were compared and a nylon membrane was choosed to conduct experiments. 2. Two devices and methods for controlling negative hydraulic heads were developed. Coupled with the devices, a system for precise control of soil moisture udring pot experiment was developed. 3. Two times of pot experiment studying wheat seedling growth under precise soil moisture control were conducted. Some very important results were obtained. 4. Capillary rise, horizontal and vertical infiltration under different nagative hydraulic heads were observed. The concepts of "critical wetting distance" and "wetting coefficient" were proposed. The linear relationship between wetting front movement distance and cumulative infiltration amount was confirmed. Spatial distribution model of soil moisture and its simple derivation method were established.

通过该项目支持，获得了以下的研究成果： 1、比较和检验了不同多孔材料，初步选定了用于水分控制的多孔膜材料； 2、完成了两种负水头控制方法与装置的研究，并制作了仪器，与负水头控制装置配套，制作了盆栽实验用水分精控盆； 3、进行了两期小麦苗期水分精确控制盆栽实验，获得了一系列重要结论； 4、进行了不同负水头下土壤的毛管上升、水平入渗、垂直入渗研究，提出了临界湿润厚度、湿润系数两个概念，确定了湿润锋与入渗量的线性关系、土壤含水量的空间分布模型，土壤含水量空间分布的简单推算方法。

Compared with the control, intercropping Centaurea cyanus and Ocimum basilicum L increased the microbial quantity significantly in different developing periods and at each soil layer, as well as regulated the ratio of the soil fungi, bacteria and actinomyees in soil microbial community.

梨园间作香矢车菊和柠檬罗勒较对照显著提高各个发育时期和各土层中土壤微生物的数量，调节土壤微生物群落中真菌、细菌、放线菌的比例。

After analyzing the soil stress, flexure moment data of central section of the sheet, and the flections data of two kinds of holding sheet models which are different on span, the paper gets the horizontal and vertical soil stress distribution rules and compares the result of the exam with calculating result of classic soil stress theory.

通过对两种跨度的挡板模型的土压力、挡板跨中弯矩、挡板跨中挠度值的分析总结，得到了挡板后土压力沿高度及水平方向的分布规律，并在土压力分布形式及数值大小与经典理论作了比较。

Soil type belongs to physical character of soil including 2 soil character parameters of particle size and limit of moisture.

土质类型是路基填料的物理性质，主要包括土粒的颗粒组成和液塑限两个指标。

The 18th article in the construction and production process of soil and water conservation facilities damaged units or individuals, shall be provided for soil and water conservation to the administrative department in charge of soil and water conservation facilities to pay compensation

第十八条在建设和生产过程中损毁水土保持设施的单位或个人，应按下列规定向水土保持行政主管部门缴纳水土保持设施补偿费

Soil and Water Conservation received from the administrative department in charge of soil and water conservation programs report within thirty days from the date, soil and water conservation program reports, fifteen days from the date of the decision to approve or disapprove, and written notice declare unit or individual.

水土保持行政主管部门自接到水土保持方案报告书之日起三十日内、水土保持方案报告表之日起十五日内决定批准或不批准，并以书面形式通知申报单位或个人。

Soil: The cherimoya performs well on a wide range of soil types from light to heavy, but seems to do best on a well-drained, medium soil of moderate fertility.

土壤：荔枝做得好，就广泛的土壤类型，由轻到重，但似乎做最好，对排水良好，中等土温和土壤肥力。

Chernozem layer with the topography and different degrees of surface evaporation, there is meadow chernozem (humus content was high, a large number of stain and iron-TB), carbonate Black calcium soil (surface with carbonate accumulation) and the black soil salinity and the saline soil.

黑钙土层随地势和地表蒸发程度的不同，有草甸黑钙土（腐殖质含量高，有大量锈斑和铁质结核）、碳酸盐黑钙土和盐渍化黑土和盐渍土。

The result indicated that: land leveling in chernozem area should be based on the actual mode of production and soil characteristics to amend the local topographic surface; water conservancy works of farmland should adopt sprinkler irrigation system to save water; field road design requires to be based on field conditions in order to maximize conservation of the farmland; creating a shelter to mitigate the harmful wind, focusing on raising soil fertility, and changing tillage methods to improve soil.

研究结果：黑钙土地区土地平整应依据实际生产方式与土壤特性采取修改局部地形面方法；农田水利设施需采用喷灌系统进行节水灌溉；田间道路设计须根据实地条件与生产方式最大限度节约耕地；营造防护林以减缓有害风；注重培肥地力、改变耕作方式以改良土壤。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。