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Spreading drywall for fertilizer

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#1 brewcrew


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Posted 03 January 2012 - 12:37 PM

They are done with drywall in our new house, and have a bunch of scraps left. I know that it is gypsum, which is good as a fertilizer, but I am wondering how I should process it? If I could somehow grind it into fines, I could broadcast it with a buggy, but how to grind it? Would it go through the feed mill? Or should I put a couple sheets at a time in the manure spreader (box spreader)? Or maybe try to borrow a slinger from someone? Any help from those who have been there before would be appreciated! Thanks!

#2 twisted856


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Posted 03 January 2012 - 01:14 PM

I would think a hay grinder would be the nuts for somthing like that .

#3 Bernie


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Posted 03 January 2012 - 01:24 PM

Sheet rock dust will be hard on the bearings on what ever you put it through. It is so fine, it gets into places you didn't know you had places. When our house was built, we threw chunks onto the garden spot. Roto-tilled, disked, etc. In a couple of seasons it was gone. The moisture in the soil keeps the dust down.

#4 Bermuda_Ken


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Posted 03 January 2012 - 04:34 PM

We have a customer who does gypsum recycling here in So. Wi. They sell the product by the processed ton.

He uses a KINGHT 716? slinger spreader as his "processor". He handles large amounts of drywall from commerical construction in Madison, WI. and Chicago, IL.

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#5 redgreen


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Posted 03 January 2012 - 04:50 PM

On a much smaller scale I have ground up sheet rock with a leaf shredder. Makes it into real fine dust suitable for spreading ((garden). Bigtime dusty operation!
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Posted 03 January 2012 - 05:40 PM

i used our slinger put a bunch of peices in the bottom and then dumped some manure on top ran it for a bit then opened the door just enough to let it out worked great plus dont get all that dust


#7 TroyDairy


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Posted 03 January 2012 - 08:02 PM

We've used scrap dry wall for bedding. If you toss chunks into our 8018 Knight slinger they disappear when mixed with sawdust. A local guy used to recycle lots of it with scrap wood when construction was hot and we would buy it for bedding. Great bedding b/c the lime dries out the stalls but calling it dusty dont do it justice! You looked like a KKK member when done and you HAD to wear a mask to breath. Felt bad for the cows so we backed away from it. Weird thing is it would really make you lagoon stink sulfery. A few scraps stomped up and tossed into you speader with poo would be fine though.
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#8 jeff70red


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Posted 04 January 2012 - 06:05 PM

Please help me understand how drywall is a good fertilizer. I have never heard this before, and I'm just wondering if this is some kind of a prank. Truly though, please explain would love learn.

#9 international3088MFD


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Posted 04 January 2012 - 06:21 PM

dry wall has limestone in it. BUT the lime content is so low in drywall that using it for fertilizer is almost laughable... that being said the organic neighbor has done it, just throwing the chunks in with manure spreader with a load of sh*t. rumor is he only did it "one time". :lol: :P

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#10 john e. grott

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Posted 04 January 2012 - 11:58 PM

Most of your drywall now is being produced at generating plants they use gypsum and the flyash , which has hi sulfer from the coal they burn . This is part of the scubbing procces for cleaner air emmisions . That is why it smells like sulfer. If you don't have a way of grinding it , maybe you could put it on a slab of concrete and drive your trac. over it at a number of different directions that might do what you need.