This is from another forum, almost exactly what I have used in the past..
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WHITETAIL DEER HOMEMADE MINERAL MIX RECIPE
Ingredients: Makes 200 lbs. for about $23.00
1 part Di-calcium phosphate, this is a dairy feed additive bought at feed stores.
Comes in 50lb Bags at around $11.00 you need one bag.
2 parts Trace mineral salt, the red and loos kind without the medications.
Comes in 50lb Bags at around $5.00 you need two bags.
1 part Stock salt, ice cream salt.
Comes in 50lb Bags at around $2.00 you need one bag.
Directions:
-Use a 3 pound or similar size coffee can to use as your measure for each part of the mix.
-Mix all together well but not until read to use, keep ingredients separate until ready to put to use.
-Dig or tear up a circle in the soil about 36 inches wide and about 6 inches deep.
-Mix your mineral mixture with the soil.
Maintenance:
-Replenish in 6 months with fresh supply of mineral, and then each year there after.
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I use a mix like that, plus some "buck jam" on a nearby stump...They are really loving it this year.
