I have not met a grower involved in precision agriculture that doesn’t love, no crave, more information on the subject. To this end, check out the very good Precision Ag Blog, compiled and written by various extension pros in the Alabama Cooperative Extension System.
Recent blog posts talk about variable rate (VR) seeding, VR calibration, data management, data collection with cellular modems, the value of on-the-go nitrogen sensors, firmware upgrades and much more.
The blog site also categorizes posts into topics to help you sort for exactly the info you seek.