Comparision of observed and predicted cauliflower yield by fao aqua crop model under different drip irrigation levels

Abstract

A field experiment was conducted at College farm, College of Agriculture, PJTSAU, Rajendra Nagar, Hyderabad during rabi 2015-16 to study the feasibility of Aqua Crop model for simulating the yield of cauliflower. The experiment was conducted in a split-plot design with eight treatments replicated thrice. Aqua Crop model was used to calibrate cauliflower yield taking field measurements like yield (t ha-1) and water productivity (kg m-3). Crop parameters like date of transplanting, number of days for germination, number of days taken for recovery, number of days taken from transplanting to flowering, number of days taken from transplanting to maturity were recorded for each treatment for crop in put parameters. Climatic data for the rabi 2015-16 was given as input for climatic files and other input parameter required for calibration was given and model was calibrated until the simulated yield and water productivity attain a near value as measured. Then the prediction error, RMSE, R2, model efficiency were calculated in order to know the efficiency of model.