Fuente: Wipo "precision agriculture" Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for instantiating logs at scheduled times. Log requirements specify respective log items and a instantiation time for each log items. A service executes periodically, and determines an instantiation time window. For each log requirement having a instantiation time falling within the instantiation time window, a log item is instantiated. By instantiating log items only at times when the log items are to be completed, resources (e.g., memory) are conserved and the number of log items requiring attention are reduced.