Frost seeding yard for chicken pasture

So, I’m looking to get some more nutritious forage for our chickens in the yard and it sounds like frost seeding may be the way to go.

Ive never done this, but it sounds pretty straightforward: broadcast seed while the ground is still frozen in the spring. Maybe do it again before winter and again the next spring too to help get good establishment.

We live in upper Michigan, zone 4, and still have a foot or two of snow in the yard. I’m planning to but seed soon so I’m ready when the snow is about gone in a month or so. The local feed store has chicory, red clover, alfalfa, timothy and turnip in bulk right now. I know the first 3 are good food for chickens but I’m unsure about timothy and not sure if i want turnips all over our yard! Plus, I’m not sure if turnip is perennial, which I definitely prefer. The yard is currently a grass mix, dandelion, self heal, some clover, daisies and a few other miscellaneous plants. Seems relatively good overall but I’d like to add more nitrogen fixers since this same space is also a food forest in the making.

The space is around 15,000 square feet (0.34 acres). Does anyone have recommendations on roughly how much seed to buy of each? Also, any tips or advice for me before I start flinging seed?

Thank you!
-Brody

I looked around online a bit, did some math and these are some rough numbers I came up with for frost seeding a mix into our 0.34 acre area.

Red clover =1.36 lbs
Alfalfa= 1.36 lbs
Chicory=0.61 lbs

Also, heres some information from a soil sample we had tested a couple years ago. Not sure if it’s really relevant at all: