砾石含量 meaning in English
gravel concentration
Examples
- As bottomland , soil depth and gavel content are not taken into account , altitude 800 m and slope = 5 are the criteria of unsuitable for cultivation temporarily
对滩涂类单元，不考虑单元的土层厚度与砾石含量，以海拔800米且坡度5判断其是否为当前不宜耕。 - Based on the lab orthogonal tests , using self - manufactured constant head permeameter , the effect of gravel content , void ratio and particle shape on the coefficient of permeability of soil - rock - mixture was studied
本文采用室内正交实验，利用自制的常水头渗透仪，研究了砾石含量、孔隙比和颗粒形状3个因素在不同水平下对土石混合体渗透系数的影响。 - The result corrected by former result was to judge the land to be suitable for cultivation or not . in the end , productivity index threshold under different suitable - levels was determined by analyzing the frequency histograms distribution of 4 productivity index . the result shows that the productivity index criteria of reserved land in beijing is that altitude 800 m , slope 15 , soil depth 30 cm and gravel content 15 %
在生产性指标方面，以北京市土地开发复垦潜力调查评价为基础，运用相关分析、主成分分析确定指标为海拔、坡度、土层厚度和砾石含量；对指标进行聚类，根据聚类结果对原有评价结果进行修正并判定后备土地资源的宜耕性；通过分析多因素综合作用下四项指标的频率分布情况，确定上述四个生产性指标在不同宜耕等级下的阈值。