Ah heck! I can't let it go. Soil. No soil. Conventional tillage, no-till, limited-till, throw and mow, throw and go.
The basics of getting a seed to germinate and keep growing are always the same. To me, throw and mow is the hardest technique in which to successfully satisfy those conditions, but it has great advantages otherwise. If you understand the rules of germination then you can break the rules of technique.
What do we need to get germination started and to keep the darned plant growing?
Moisture and lots of it.
Each plant's seed needs something a little different. Some seeds need to absord X times its dry weight in water. Others just a fractional percentage. Once germination starts it had better not stop -- continued moisture - enough to get the germplasm fully engaged and the first or primary root "deep" into the ground (where it's protected from drying).
Consider planting in a conventional tillage system. A conducive seed bed is created. The seed is placed at a proper depth in the soil and the loose soil is packed firmly around the seed removing drying air by press wheels, cultipackers, or dumb luck. With a tip of the cap to hydroponics, good seed to soil contact is the golden rule of planting. The soil is the sponge. It rains. It holds water. The seed uses the water to get germination going. the soil serves as a blanket, keeping the tender cotelydon - the first leaves, moist and away from drying sun and air. Perfect - almost. Great for germinating seeds. Not so good for soil erosion and organic matter maintenance.
Now, if you can understand and control these factors in "throw and mow" you're ready! How do you get the seed into the soil? Or, at least keep it wet enough once germination starts it continues at least until the primary root finds its way into the soil and the cotyledon leaves are establishing as a viable plant. The mulch cover helps. Except for a masterful or lucky few, germination percentage will be much lower than one would expect in a conventional tillage system, but the soil erosion and organic matter maintenance problems are eliminated.
Good luck!