PhenoWin – An R Shiny application for visualization and extraction of phenological windows in Germany

There is an increasing need for small scale information about the temporal shifting of the phenological crop development for applications like fertilization, irrigation, crop and soil protection, weather index insurance, yield prediction, crop classification or as bio-indicator of climate change. This application note introduces PhenoWin, a tool to extract and visualize phenological windows for any given year from 1993 onward and user-defined regions in Germany. Phenological windows represent successive start and end dates of development stages for different main crops, which have been interpolated using the phenological model PHASE. PhenoWin was implemented using R language and the R Shiny web framework. PhenoWin can be used as standalone application or can be embedded in web pages. Both, the used phenological data sets and the PhenoWin source code are available under open source license.