I have done several Google searches on the subject of planting by the moon signs. I got loads of hits, none of which were from any university or scientific report. Surely if there was any credence to this "phenomena" someone in the scientific community would have something to say about it? Farmers and ranchers who rely on growing things would be practicing it?
This all seems to reinforce what I have felt all along: There is no benefit in consulting the moon when planting. Its strictly folklore!
We would all do better by consulting things like the last average frost date for our area, soil temperatures, air temperatures, soil moisture, and the extended weather forecast. For sure don't plant warm weather crops when there is 5 days of rain and cold forecast. The seed will likely lay in the ground and rot, no matter where the moon is.
Gardening at 5000 feet elevation, zone 4/5 Northern Utah, Frost free from May 25 to September 8 +/-