Fecha de publicación: 12/12/2014 Fuente: Wipo "precision agriculture" WIRELESS UNDERGROUND WATER SENSOR NODE contains sensors and communication unit. This node can detect the underground water with wireless communication capability. This is an innovative approach to determine the soil moisture content in soil and to update the information to the server through RF (radio frequency/ wireless). This system is more useful for precision agriculture to find the exact requirement of water for different crops. The sensor works on the principle of change in capacitance which occurs due to the change in dielectric property of the soil. This change is acquired by data accusation system and the data is transferred through the communication unit. It is transmitted to the collection point for further analysis and decision making of the system. The communication of each node is based on application based protocol for wireless sensor network. This node is useful in various application sectors for remote underground water sensing and monitoring.