Abstract: The effects of the basic seedling, the quantity of nitrogenous fertilizer and phosphate fertilizer applied to the yield were studied by ‘Polly component quadratic spinning combination design’ with the principle of the best imitating combination in agricultural systems engineering in hilly dry land in the west of Henan. The results show that the effects of the factors mentioned above on the wheat yield were in the order as nitrogenous fertilizer,phosphate fertilizer and the basic seedling. Applying fertiliz...