To simplify this, [Timm Bogner] created Farm Data Relay System which simplifies the process of combining LoRa, 2.4Ghz modules and serial communications in various topologies over wide areas.

Other than the interesting question of how to keep soil moisture sensing nodes like this powered up over long periods of time (perhaps periodic retrieval to replenish the battery), this would seem ...

“The integration of our Wireless M-Bus and LoRaWAN ® Dual Stacks into the Quectel KG200Z LoRa module enables seamless and reliable communication for various IoT applications.