Posted by JRSutton on February 27, 2015 at 05:06:23 from (108.49.155.221):
In Reply to: sheet rock posted by Bruce SEKs on February 26, 2015 at 19:17:11:
Gypsum is calcium sulfate - lime is calcium carbonate.
They will both add calcium to the soil.
Calcium carbonate (lime) will raise PH levels while calcium sulfate (gypsum) will not.
Gypsum also provides sulfer.
Gypsum is also very water soluble, it doesn't have to be ground up to the same powdery fine-ness that lime dose.
That said, you'd need one heck of a load of drywall to be of much use for even a small field.
Then you have additives - especially water proofing chemicals - is it all blue board? is there green board? You're probably more likely to find the mold/waterproofing chemicals in the green board.
But on top of that my bigger concern would be what was put ON the drywall? Assuming it's been painted, you'd also be introducing a whole list of god knows what chemicals depending on the era the materials are from - and you can just cross your fingers that it's not old enough to be covered in lead paint.
And finally, as somebody else mentioned - screws/nails. If it's a pasture or hay field - I wouldn't risk that.
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