Near field communication, or NFC for short, is an offshoot of radio-frequency identification (RFID) with the exception that NFC is designed for use by devices within close proximity to each other. [source] 

Bluetooth and Wi-Fi seem similar to near field communication on the surface. All three allow wireless communication and data exchange between digital devices like smartphones. Yet near field communication utilises electromagnetic radio fields while technologies such as Bluetooth and Wi-Fi focus on radio transmissions instead. [source] 

Near field communication (NFC) technology lets smartphones and other enabled devices communicate with other devices containing a NFC tag. Whether you are swiping a smartphone at the grocery store, waving it over a display at a local museum, or bumping phones with a friend to share the latest games, near field technology lets you pay, play, and learn easily. Explore our website to learn more about how both individuals and businesses benefit from NFC. [source] 

Use of NFC in Agriculture
A list of possible everyday uses for NFC can be located at this link. None of these significantly enable AgTech strategies.