查询词典 infertile soil

Pixie is back on home soil and first things first, she wants to let you know how her trip to the States was!

Pixie回家了。她第一件想做的事是告诉你她的国家旅行怎样。

Placation organic fertilizer in soil significantly increased content of available phosphorus, and that of PMSW(P-enriched MSW fertilizer treatment) treatment was higher than others.

在植物生育(来源：ABce7cC论文网www.abclunwen.com)期内，无机磷的Ca_(2-)P，Ca_(8-)P，Al-P 的含量明显降低，并且两种供试作物作物的趋势相同。

A study on yield locus of unsaturated soils on p-s plane and soil-water characteristic curve.

非饱和土在p-s平面上的屈服轨迹及土-水特征曲线的探讨

Thirdly, according to the development of the frozen soil, the coupling model of single freezing pipe of axial symmetry of temperature field, stress field and moisture migration is put forward firstly. Then, by means of the progressing principle of potential field, the coupling model of temperature field, stress field and moisture migration which is under the condition of the multi-freezing pipes is extended. At last, the energy balance equation, stress balance equation, quality balance equation, geometric equation, physical equation, initial and boundary conditions etc are adopted to give the analytic solution to the problem of plane axial symmetry of single freezing pipe.

第三，在对室内试验和现场实测结果研究的基础上，分析了土体冻结过程中温度场、应力场、水分场耦合原理，并按照冻土体形成发展过程，首先建立了单一冷源冻结轴对称温度、应力、水分场耦合模型；接着利用势场的迭加原理，将单一冷源情况的三场耦合问题推广到多冷源情况的三场耦合；最后根据能量守恒平衡方程、应力平衡方程、质量守恒平衡方程、几何方程、物理方程、初始及边界条件，解出了单一冷源平面轴对称问题的解析解。

Soil texture; plane classification triangle coordinate diagram; computer graphics; automatic

结合国外土壤质地计算机分类方法研究的状况，本文基于计算机图形学技术。

The dynamic response of soil to incident plane P-SV wave s is studied in this paper.

研究了横观各向同性层状场地对平面入射P-SV波的响应，并考虑了平面内偏振角的影响。

The effect of improvement on planosol by the application of the four types of ploughs suggest that there were hard clods between two chisel if the cultivate depth is less than 40cm; there are hard triangle clods between two chisel if the complete deep cultivate reach 40 cm and soil hardness is 20～40kg/cm〓 if the cultivate horizon is shallow or below 20 cm, the expected effect of improvement will not be obtained.

3应用三段式心土犁的土效果。不同改土机械改良白浆土对比试验结果表明：各种深松耕深不足40cm，且深松铲之间存在硬隔，达不到预想的改土效果。

Their roots are home to bacteria that put nitrogen, an important plant food, into the soil.

他们的根给细菌补充氮－－一种很重要的植物的食物－－到土壤里。

Its research programs include entomology, plant pathology, plant science, and soil science.

该系的研究课题包括：昆虫学，植物病理学，植物科学和土壤科学。

The study aimed to provide the basis for management of soil fertility in rubber plantation.

［目的］为胶园土壤肥力的管理提供依据。

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。