In the context of US CERES-maize model simulation was conducted of 1992～1993 data of maize sown at a range of times in Yichuan county, Henan province, resulting in good simulations of growth conditions and yield per hectare and from the relation of stand density and sowing time to the yield were proposed an appropriate density of 8.25 and even 9.25 stands·m^-2 in fields of sufficient fertile and water supply, optimal sowing period from May 31～July 5 and 6 cm depth. Comparison with simulations of openfield maize raised over Nanyang, Henan showed mean relative error of 5.6 %. Also, it was demonstrated that theoretical solar radiation could be used in place of measurements on a daily basis so that the model is applicable for operational purpose.