According to the specific requirements for soil moisture content monitoring

a new type of portable soil moisture detector is developed.The instrument measure soil moisture based on principle of frequency domain reflectometry（FDR）and calibrates the result by standard method of drying-weighing

obtain geographic location and test time at the same time.Measurement information is transferred to remote data center and mobile phone via GPRS/GSM in time.Field tests show that the measurement error is less than 3 %

data transmission without error.The new portable soil moisture detector has advantages such as high cost-effective

simple operation

which is suitable for agricultural technician to use

has important practical significance for soil moisture real time monitoring and intelligent decision-making.