eng Enviro Research Publishers Current Agriculture Research Journal 2347-4688 2321-9971 2025-09-08 13 2 556 565 25176 article Rahul Ashok Pachore 1 Sachin Dingre 2 Mahanand Mane 3 Mahesh Patil 4 Department. of Irrigation and drainage Engineering, Mahatma PhulekrishiVidyapeeth, Rahuri, Ahmednagar Maharshtra, India Department Of Iririgation and Drainage Engineering, Dr. Annasaheb Shinde College of Agricultural Engineering and Technology. Mahatma Phulekrishi Vidyapeeth, Rahuri, Ahilyanagar, Maharshtra, India College of Agriculture, Pune, Mahatma Phulekrishi Vidyapeeth, Rahur, Maharshtra, India Department. of Statistics, Post Graduate Institute, Mahatma Phulekrishi Vidyapeeth, Rahuri, Ahilyanagar Maharshtra, India Impact of various irrigation regimes on agricultural yield can be assessed with use of crop water productivity models.  Agricultural water productivity model called AquaCrop has been adopted by FAO's Land and Water Division in 2009. It’s especially appropriate for situations like semi-arid regions, where water isamajor agricultural production constraint, and it replicates the yield response to water for herbaceous crops. Calibration of AquaCrop model for several irrigation regimes for garlic (Allium sativumL.) was the aim of this work to ascertain the impact of these regimes on crop growth and yield parameters. A randomised block design field experiment with 3 replications has been carried out at Mahatma PhuleKrishi Vidya peeth in Rahuri, Maharashtra, during 2021–2022 rabi season. The experiment included 27 treatment combinations applied at different growth stages of garlic: vegetative stage, bulb initiation, and bulb development stage.According to the results, there was no discernible difference in yield.The maximum simulated yield obtained in Treatment (T_1­) was 8.08 t ha^-1, and lowest yield obtained 4.69 t ha^-1 in treatment T₂₇. Maximum simulated evapotranspiration was recorded in treatment (T₂, was 363.5 mm, and lowest, 239.6 was recorded in treatment T₂₇. Garlic's crop production and evapotranspiration water productivity were accurately reproduced by the AquaCrop model.  The AquaCrop model can be utilised to simulate CWR of bulb crops, including garlic, according to validation utilizing Nash-Sutcliffe efficiency (E), RMSE (root mean square error),index of agreement (d). https://www.agriculturejournal.org/volume13number2/validation-of-aquacrop-for-deficit-irrigation-on-garlic-allium-sativum-l-for-semi-arid-conditions/ AquaCrop; Evapotranspiration; Garlic yield; Index of Agreement; Irrigation; Productivity; Root mean square Error; Water Requirement.