Rice is a major food crop globally, but yields are threatened by inefficient production practices. Laser land levelling is a technology that can enhance rice cultivars through optimised field conditions and water use efficiency. This study evaluated the effects of laser versus traditional land levelling on productivity and water savings of three rice cultivars in Egypt using a two-year split-plot field experiment with three replications. The land levelling methods (laser levelling, normal levelling, no levelling) were assigned to the main plots, and three Egyptian rice cultivars (‘Sakha 108’, ‘Giza 177’, ‘Giza 178’) were grown in the sub-plots. Data was collected on crop yield parameters, grain production, water use, and water use efficiency. Results showed that laser levelling increased plant height, flag leaf area, panicles per plant, filled grains per panicle, seed setting percentage, 1000-grain weight, and grain yield compared to traditional practices. The highest yields were obtained with laser levelling of ‘Sakha 108’ (12.22–12.31 Mg∙ha^–1) and ‘Giza 178’ (12.20–12.29 Mg∙ha^–1), while recorded 9.12–10.30 Mg∙ha^–1 in control fields. Laser levelling reduced total water use by 1793 m³∙ha^–1 without reducing yields. Among cultivars, ‘Sakha 108’ had the highest water use efficiency under laser levelling. Overall, laser land levelling increased rice productivity by enhancing yield components and water productivity. Adoption of laser levelling could increase rice yields sustainably with less water usage in Egypt and similar regions. These findings demonstrate the benefits of laser levelling for enhancing rice cultivation through improved agronomic performance and water savings.

CropSyst (Cropping Systems Simulation) is used as an analytic tool for studying irrigation water management to increase wheat productivity. Therefore, two field experiments were conducted to 1) calibrate CropSyst model for wheat grown under sprinkler and drip irrigation systems, 2) to use the simulation results to analyse the relationship between applied irrigation amount and the resulted yield and 3) to simulate the effect of saving irrigation water on wheat yield. Drip irrigation system in three treatments (100%, 75% and 50% of crop evapotranspiration – ETc) and under sprinkler irrigation system in five treatments (100%, 80%, 60%, 40%, and 20% of ETc) were imposed on these experiments. Results using CropSyst calibration revealed-that results of using CropSyst calibration revealed that the model was able to predict wheat grain and biological yield, with high degree of accuracy. Using 100% ETc under drip system resulted in very low water stress index (WSI = 0.008), whereas using 100% ETc sprinkler system resulted in WSI = 0.1, which proved that application of 100% ETc enough to ensure high yield. The rest of deficit irrigation treatments resulted in high yield losses. Simulation of application of 90% ETc not only reduced yield losses to either irrigation system, but also increased land and water productivity. Thus, it can be recommended to apply irrigation water to wheat equal to 90% ETc to save on the applied water and increase water productivity.