When attempting to determine the moisture retention of soil, an undisturbed sample of a uniform size is required. This is a range of 50mm diameter soil water samplers that are designed to collect soil water which can then be extracted from the device and taken to the laboratory for analysis.
The sampler is installed into a hole made with a screw or bucket auger(refer to Hand Auger Kits). Water then enters into the sampler through the porous ceramic cup at the end of the sampler.
The rate of water accumulation depends on the soil type and moisture content. This method of water sampling can further be effectively used to determine Nirate leaching from fertilizer applications.