The development and application of the squeezing instrument for sampling soil water

The structure,working principles and performance of the squeezing instrument for sampling soil water,which was researched and produced by Institute of Geography,CAS,were introduced in this paper. Performance test and technical examine showed that the instrument has high stability and repeatability.The instrument can be used for soil water chemistry studies. It has the features such as fast sampling,easily operation and etc., and can also be used at lower soil water content (slightly over 10%)