Prediction of farmland irrigation is of great significance to rational planning and optimal allocation of water re -sources .The article based on the farmland water balance equation ,deduced that nonlinear relationship between irrigation amount I and pt-1 、pt -2 、pt-3 that rainfall irrigation amounts of each period、irrigation area S;which established a BP net-work prediction model irrigation amount nerve .Test results show irrigation amount BP neural network prediction accuracy is about 94 .5%.Thus we can see that in the irrigated area , rai...
