Quantitative estimation of fertilizer requirements can help to increase maize (Zea mays L.) yields and improve the fertilizeruse efficiency. The model for the Quantitative Evaluation of the Fertility of Tropical Soils (QUEFTS) was calibrated formaize by use of soil fertility data and fertilizer trials at different sites of the Huang Huai Hai river plain in China. TheQUEFTS model accounts for interactions between nitrogen (N), phosphorus (P) and potassium (K). It describes theeffects of soil characteristics on maize yields in four steps: (1) assessment of the potential supply of N, P and K based onsoil chemical data; (2) calculation of the actual uptake of N, P and K, in function of the potential supply as determined instep 1; (3) draft the yield ranges as a function of the actual uptake of N, P and K as determined in step 2; (4) calculation ofthe maize yield based on the three yield ranges established in step 3. Data of field experiments with different fertilizationtreatments of various regions in China during the years of 1985 to 1995 were used to calibrate the QUEFTS model forsummer maize. In step 1 the N, P and K recovered from their amount applied were described by new equations. Theminimum and maximum accumulated N, P and K (kg grain kg-1) in summer maize were determined as (21-64), (126-384) and(20-90), respectively. The simulated yields were in good agreement with the observed ones. It was concluded that thecalibrated and adjusted QUEFTS model could be useful to improve fertilizer recommendations for maize in the Huang HuaiHai plain of China. The model for the Quantitative Evaluation of the Fertility of Tropical Soils (QUEFTS) was calibrated formaize by use of soil fertility data and fertilizer trials at different sites of the Huang Huai Hai river plain in China. TheQUEFTS model accounts for interactions between nitrogen (N), phosphorus (P) and potassium (K). It describes the effects of soil characteristics on maize yields in four steps: (1) (2) Calculation of the potential supply of N, P and K based onsoil chemical data; (2) calculation of the actual uptake of N, P and K, in function of the potential supply as determined instep 1; (3) draft the yield ranges as a function of the actual uptake of N, P and K as determined in step 2; (4) calculation of the maize yield based on the three yield ranges established in step 3. Data of field experiments with different fertilization tons of variou s regions in China during the years of 1985 to 1995 were used to calibrate the QUEFTS model forsummer maize. In step 1 the N, P and K recovered from their amount applied were described by new equations. The minimum and maximum accumulated N, P and K (kg grain kg-1) in summer maize were determined as (21-64), (126-384) and (20-90), respectively. The simulated yield were in good agreement with the observed ones. It was threaded that thecalibrated and adjusted QUEFTS model could be useful to improve fertilizer recommendations for maize in the Huang HuaiHai plain of China.