Rhizosphere Research Products (RRP) is a small Dutch company, specialized in products for sampling water in the rhizosphere, called Rhizons. RRP develops and produces many varieties of Rhizons, there is one for each purpose. With our knowledge and experience in soil science and analysis techniques, we are able to advise you on the most suitable Rhizons for your experiments. If there is not yet a Rhizon that meets your demands, we will do our best to produce custom made Rhizons. For specific research purposes, like for example research under special conditions, please contact us Rhizon samplers extract small volumes of pore water from soil and sediments, in an easy, non-destructive way. They can be used for sampling water from unsaturated soils as well as from saturated zones. Rhizon samplers are used for the measurement of all dissolved compounds in soil moisture or water,