This paper presents a web system for farming management that implements a conceptual framework for modeling the production system at a farm scale. The web system supports the design of the production system, which is logically split in three parts: the decision support sub-system the technical sub-system, and the bio-physical sub-system. Additionally, the web system was designed using interdisciplinary research project management (IRPM) concepts, with an architecture known as Model-View-Controller (MVC), that is, it was developed applying the MVC Evolutionary Acquisition IRPM.