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ISO 11274:2019
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ISO 11274:2019 Soil quality - Determination of the water-retention characteristic - Laboratory methods
standard by International Organization for Standardization, 10/01/2019
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Full Description
ISO 11274:2019 specifies laboratory methods for determination of the soil water-retention characteristic.
This document 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 5 kPa to 1 500 kPa;
d) method using a pressurized gas and pressure membrane cells for determination of matric pressures from 33 kPa to 1 500 kPa.
Guidelines are given to select the most suitable method in a particular case.