Aiming at deficiency of existing instrument for measurement of soil moisture

a new type of portable instrument for measurement of soil moisture is developed. Sensors measure the soil temperature and humidity data quickly

GPS automatically obtain time

longitude and latitude information

data not only can be temporarily stored in memory chips of instrument

but also can be sent timely to the backstage database and mobile phone users by GPRS / GSM. Through temperature compensation and field verification experiments show that temperature compensation item is Δy = 0. 000 2 t3- 0. 011 t2+ 0. 444 1 t- 6. 423 2

all functions of instrument work properly

absolute error of measurement range of- 3. 64 %

3. 82 %

avera

ge absolute error is 2. 24 %

it has high precision

and suitable for application in local agriculture technique and water conservancy department

and it will help improving the quality of agricultural water conservancy informatization level.