The Decision Support System for Agrotechnology Transfer (DSSAT) is a software application that includes crop simulation models for over 42 crops. It helps in modeling crop growth, development, and yield based on soil-plant-atmosphere interactions. DSSAT is widely used for various applications, such as precision agriculture, climate impact assessments, water use, greenhouse gas emissions, and long-term sustainability. The system requires daily weather, soil, and crop management data, and runs simulations to update plant and soil balances. It allows users to conduct virtual experiments and make informed decisions on crop management strategies, reducing the need for real-world trials. DSSAT also enables model evaluation against experimental data to improve accuracy before applying results to real-world decisions. The system is used globally by researchers, farmers, and policy-makers.