Some progress in TDR manufacture and application

Through analyzing the TDR literature,some new progress in TDR manufacture and application were summarized and the several problems in using TDR were generalized.The result shows that the coil type of probe can solve the problem of too long or too short TDR probe; multiplex TDR probe can measure both soil water content and potential or thermal properties or temperature and salinity simultaneously. With the temperature rising from5℃ to 45℃,the soil water content detected by TDR will decline in sandy loam soil, and rise in clay loam and organic soil. The TDR probe should insert into soil with an angle and avoid the wrong operation,such as swaying or un-paralleling.