Recently, a lot of Web applications were developed by the technique called as mashup that combined several opened Web APIs of Web services. It is necessary to standardize the data representation form and design easily understandable Web API to combine data and an agricultural model including crop growth prediction model and pest forecasting model, when an agricultural application is constructed by using Web API. Therefore, JAMF became taking the place of weather database mediation service MetBroker that ended service, and the function to acquire meteorological data from Agro-Meteorological Grid Square Data (AMGSD) and Automated Meteorological Data Acquisition System (AMeDAS) has been implemented on it with Web API. Moreover, Web API function to execute agricultural models has been implemented.

Recently, the number of contractors who grow rice for whole crop silage have increased. The fields on which they work is distributed in a wide area and the number of them is large. Therefore, recording framing diary as easily as possible is required. To solve the problem, we developed the Farming Diary Tool for smartphones. This tool works on almost kinds of browsers on smartphones or desktop computers, and has map view function and record type restriction function to avoid mistaking. This tool shows a progress map predicating fields with different colors based on the state of farming progress of the fields. Users creates farming records for each rice field at an event of start, end, interruption or resumption of harvesting. This tool restricts record types to be selected, responding to the progress at the field utilizing the state transition diagram, where states are associated with progresses and transitions are associated with record types. The tool was evaluated 3 times in 2 areas in different 2 prefectures. Any evaluators accepted favorably.