These management systems will be some combination of computerized decision support systems and the accumulated wisdom of experienced managers. Decision support systems require databases. Wisdom comes with long experience. These management systems will be site specific. Generic decision support systems will be developed, but their performance on your farm will be enhanced by data from your farm.
Agricultural databases take time to accumulate.
For example, because of weather variability, accurate information on site specific yield potential and problems may require several seasons of data. Retesting soils at the same sites creates data on fertility trends. History shows that most of the benefits of any new agricultural technology go to the early adaptor. Those who lag have often been forced out of farming. Precision farming is expected to follow the same pattern.