BS 7755-5.5-1999 土壤质量.物理方法.实验室方法

标准号：BS 7755-5.5-1999
中文标准名称：土壤质量.物理方法.实验室方法
英文标准名称：Soil quality - Physical methods - Laboratory methods
标准类型：B11
发布日期：1999/1/15 12:00:00
实施日期：1999/1/15 12:00:00
中国标准分类号：B11
国际标准分类号：13.080.40
适用范围：This International Standard specifies laboratory methods for determination of the soil water-retention characteristic. This International Standard applies only to measurements of the drying or desorption curve. Four methods are described to cover the complete range of soil water pressures as follows: a) method using sand, kaolin or ceramic suction tables for determination of matric pressures from 0 kPa to -50 kPa; b) method using a porous plate and burette apparatus for determination of matric pressures from 0 kPa to - 20 kPa; c) method using a pressurized gas and a pressure plate extractor for determination of matric pressures from -5kPa to-1500kPa; d) method using a pressurized gas and pressure membrane cells for determination of matric pressures from -33kPa to-1500kPa. Guidelines are given to select the most suitable method in a particular case.