Congrats!!!! That thing is a MONSTER!!! Sounds like a story you'll remember for a lifetime.
I've hunted deer and elk in the Rockies as long as I can remember. Heck I was concieved on a deer hunt but let's not get off topic. I've always wondered how run and gun hunting/shooting in the high country compared to military shooting. It sounds like they can be two different animals in some cases. I spend a lot of time and energy practicing for scenarios exactly as you found yourself in. I've even passed up some shots because I couldn't get steady enough.
You probably have forgotten more about shooting than I know. With that being said I have always believed that proper breathing was important to accuracy but when I'm out of breath I have found that if you can aquire your target quickly it's helpful to hold your breath and you will actually be a bit steadier. Works for me anyway. I only hold my breath though when I'm panting heavily......it's not something I would do in a calmer situation. Has anyone else tried this?
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.