Glyphosate works well, but it needs to be in some sort of rotation. Relying solely on glyphosate will eventually lead to resistance problems down the road.

I think we're just talking about the initial kill for planting. At least I was.

i want to plant a food plot and i dont want any weeds in it. what should i do?

Either Burn or spray round up...disk, plant, etc. etc....Buy Arrest and/or Slay which will kill either grasses or broad leaves depending what you want to get rid of and spray it once your plot has began to grow

Give up now. Just kidding, but you will have weeds. It's just a matter of how many. How you treat them depends on what you plant.

i dont think im going to burn now becasue i heard that when you burn it it keeps weed seeds in the dirt or something. that what they said at qdma forums. i may im going to just cut the field, spray with round up. wait a week or so then plow and disk, then broadcast buckwheat, lightly disk in then roll over it. (i heard that buckwheat it weed "resistant" and it takes over the weeds) then in august cut the buckwheat and then disk the field again and then plant my other seed

Based on my experience, you’ll need to modify your plan a bit.

1. You’ll need to wait at least week between mowing and spraying. More if things are still growing slowly in early-mid spring. The plant needs to be actively growing for best results.
2. 1 week for a good kill isn’t nearly long enough. There are things that can help for a faster kill, but I would expect a minimum of 3 weeks. I like the grass completely dead to make working the soil easier. Dead grass and roots break up better than green ones.
3. Just to save tractor fuel, you can either drag or disk buckwheat seed in. I think that stuff will germinate on a rock, so I wouldn’t waste fuel on doing both. Also, buckwheat is primarily used as a soil builder, not so much to kill weeds. Once you mow it and then work the soil again, new weeds come right back. As will more buckwheat unless you mow before it goes to seed. I would suggest you do.
4. Give plenty of time between mowing the buckwheat and planting new seed. It’s very stemmy and it can be hard to incorporate into the soil. I mow it and run the disk over it, then let it sit for a couple of weeks to start to decompose. Then I come back and finish the seed bed with the disc. This also allows many weeds to germinate, which are then killed when I re-worked the dirt for the final time.
[ol][/ol]
These are just things that I found work best for me. I’m sure everyone does things a little different with similar results.

thanks for the advice. i want to plant the buckwheat mid-may when should i start with this whole process?

what do you mean by that bolded part?

The weed seeds are there, they will always be there, and there isn't anything you can do to remove them. So don't let that keep you from burning.

And like has already been mentioned, don't do anything to damage the plants if you are going to spray. You want the plants healthy when you spray for best results. And then you want to leave them alone and give the chemical time to act. 1 week is probably not enough.

Also, if you are going to disk, I probably wouldn't worry about spraying unless you have so much growth that you need it dead and dried to get through it with the disk.

And I believe what M.Magis is talking about is anytime you expose the soil to light, some of those weed seeds I mentioned earlier will germinate. Doesn't matter if you burn, plow, or mow. You will get a weed response if there is enough moisture in the soil for germination.

texan i was planning on spraying round up on the weeds before i plant buckwheat, not while it is growing i think there was a misunderstanding?

i will burn if you reccommend it. im going to be plowing then disking before i plant buckwheat in spring and then in the fall, plowing and disking the buckwheat under then planting my other seed. is the roundup really worth it if im going to be working the soil this much?