computerized system for irrigation management, namely, for retrieving data from the field and analyzing the data, comprised of field sensors for measurement and monitoring of soil moisture, weather conditions and plant condition and behavior, weather stations, water meters, tipping buckets, receivers, antennas, transmitters, repeaters, personal computers and related software; a computerized system for irrigation management, namely, for controlling the quantity and frequency of irrigation, comprised of a central processing unit, controller network for communicating with input/output devices, output modules, input modules, power supply, computer display, keyboard, remote control units, and related software; field sensors for measurement and monitoring of soil moisture, weather conditions and plant condition and behavior; a radio system comprised of a base station, repeater and transmitters for use in remote access irrigation control; computer software programs with applications for storing data regarding soil moisture, weather conditions and plant condition and behavior, for processing same, for analyzing same, for displaying same visually and for documenting same; computer software programs with applications for controlling frequency and quantity of irrigation; computer hardware components for controlling frequency and quantity of irrigation, namely, a central processing unit, controller network for communicating with input/output devices, output modules, input modules, power supply, computer display, keyboard, remote control units