| In accordance to the water supply-requirement ratio based on the principle of farmland water equilibrium, the index model of drought monitoring and prediction for spring wheat in dry farmland in east part of Gansu province was established using the field experimental data, and the grade criterion of crop drought was determined. Furthermore, the software of service system of drought monitoring and prediction for spring wheat in dry farmland has been compiled. Finally, the frame and function of the system was briefly introduced, and the prediction precision of the system was explained as well. |