from what I've seen the mechanicals seem to have a bigger cutting diameter, In oregon we can only use fixed blade so i dont have any first hand experiance with mechanical. I wish our law makers would change the laws, I wanna use the NAP blood runners, even if they failed it would still be like a fixed blade with a legal diameter.
Let me start off by saying I am not a farmer.
I am a deer hunter and I do own a tractor and have all of the equipment - but that does not make you a farmer any more than standing in the garage makes you a car - well, you get the picture!
Having said that - and with most of my ineptitude fairly well hidden - I do think that buckwheat is one of the most under rated cover crops out there.
I say cover crop because I see mixed results as it relates to the deer eating the plants.