Simulation Modeling of Growth Parameters for Rice Genotypes at Different Nitrogen Level and Different Dates of Transplanting Using Ceres 3.5 V for Eastern Uttar Pradesh

The present investigation was carried out during Kharif season of 2005–06 to investigate the CERES 3.5v model validations for rice at different dates of transplanting and different varieties. Treatment consisted of three varieties viz. Sarjoo-52, NDR-359 and Pant Dhan-4, two dates of transplanting viz. July 5^th, 2005 and July 25^th, 2005 & three nitrogen levels viz. 80 kg/ha, 120 kg/ha and 160kg/ha. The experiment was laid out in randomized block design (RBD). Among the genotypes, prediction accuracy of Pant Dhan-4 was found better in respect of no. of tillers/m², 50% flowering (DAT), panicle initiation (DAT) and physiological maturity (DAT) were better on 5^th July transplanting at 120 kg/ha nitrogen in comparison to 25^th July transplanting. The simulation modeling was subsequently validated against observed data from field experiment. From the response of simulation model it is observed that accuracy of simulated value decrease with late sowing in all the varieties.