Soil Solution Extraction Technic in Vadose Zone

Soil solution sampler is a kind of equipment for soil solution sampling in fieldwork, it can be used for water saturated zone sampling, also it can be used for solution sampling in vadose zone. The well developed equipment offered an important instrument for monitoring on soil solution componential variation and repeated soil solution sampling for laboratory and experimental ground in many research fields. This paper described the ordinary methods of soil solution sampling namely direct soil sampling, flow automatically method and suction method, introduced the operation methods, suitable range and installation of figuline soil solution sampler. As an example of TQ-1 and TQ-2 type soil solution sampler developed by institute of hydrogeology and environmental geology CAGS, it special introduced the soil solution sampler used in fixed position sampling method with broad applicability.