Crop field monitoring is useful class of sensor network applications, using Internet of things application for smart agriculture with enormous potential benefits for the farmers and society as a whole. This project represents the design and the implementation of a Wireless Sensor Network using Internet of things (IOT) that monitors the air temperature, humidity and life wetness in a crop field and from remote places. The sensor data is wirelessly transmitted to a centrally located computer or mobile terminal that logs the field data within seconds. The data collected can aid the farmers in achieving maximal crop productiveness and water management.