2013. Simulating the interactive impact of nitrogen and promising cultivars on yield of lentil (Lens culinaris) using CROPGRO-legume model. Int. J. Agric. Biol., 15: 1331‒1336 Abstract Crop models are particularly valuable for understanding research across varying disciplines, crop system managements and policy analysis. The proposed study was carried out to evaluate the performance of CROPGRO-legume model under Chickpea in irrigated conditions of Faisalabad. The collected data against outstanding treatment in the field was used to calibrate the model and rest of data was used for model evaluation. Model simulated flowering and maturity dates well for all cultivars of chickpea. Comparison of simulated and observed data showed that model simulated TDM and grain yield with RMSE 248 and 34 kg ha -1 , respectively. Punjab Masoor-2009, NIAB Masoor-2002 and NIAB Masoor-2006 were simulated accurately by model with the values of R 2 96%, 95% and 94% for TDM, respectively. Agreement of statistics (d index) for TDM in all cultivars was 0.90. Generally model simulated well under non stressed condition. However error was higher in simulation at lesser level of nitrogen in all crop parameters. There is dire need to quantify growth and yield under varying climatic conditions to assess the accuracy of model simulations. © 2013 Friends Science Publishers