Introduction & objectives | Project setup | Minimal model inputs | Creation of the input dataset | Reference simulation (rainfed maize) | Defining irrigation strategies | Threshold-based irrigation strategies (TBIS) | Irrigation turns and operational flexibility | Multi-period strategies and phenological targeting | Building the input object for all strategies | Simulation of all strategies | Water and growth dynamics | Soil water reserve and hydric stress | Biomass and yield dynamics | Total Water – Yield relationship | Main patterns | Strategy objectives and interpretation | Interpreting the water–yield relationship as a production function | Discussion and conclusions

Introduction | The Optirrig model in a nutshell | What is the OptirrigCORE package? | Let’s Get Started! | Prerequisites | Step 1 : Install the OptirrigCORE Package | Step 2 : Load Climate & Irrigation data | Step 3 — Describe the simulation configuration | Which crops and soils are available? | Step 4 — Run the simulation | run_model() options | Step 5 — Visualize the outputs | Wrap-up

Introduction | Overview of the workflow | Defining the calibration problem | Calibrated parameters | Observations used for calibration | Objective function | Rationale | Mathematical formulation | Normalization | Weighting | Handling sparse and dense observations | Internal split-sample validation | Principle | Constructing the groups | Interpretation of one split | Screening the parameter space | Parameter bounds | Candidate generation | Candidate evaluation | From screening to local optimization | Selecting distinct starting candidates | Initializing Nelder-Mead | Local optimization with Nelder-Mead | Role of Nelder-Mead | Bounds during local optimization | Outputs retained for each split | Selecting the final parameter set | Why the best split-specific optimum is not necessarily the final choice | Practical final-selection strategies | Methodological reference | Conclusion

Introduction | Run | Crop | Soil | Yield | Economics | Irrigation (option)

Introduction | Crop | Water Balance | Yield/Economics | Irrigation