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Use of Agricultural Processing waste in composting

Posts: 630
Location: Huntsville Alabama (North Alabama), Zone 7B
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Are there any resources for me to identify good candidates in my area (North Alabama), where the waste products from processing agricultural products can be used in composting without having to remediate first.
For instance, I know of a cotton gin that will load you up with all the composted gin trash (stems, seed hulls etc) that you can carry.  The concern is the
chemicals used to kill the plant in order to harvest the cotton may still be in the compost.  Another choice maybe slaughter houses for blood meal.
Since I live in an area where hardwood trees are in abundance I can get all the browns (wood chips) I can handle (delivered too).
Is there a resource or guidelines where I can safely utilize these resources with my composting?  TIA
Posts: 89
Location: Missouri Ozarks
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Complete Book of Composting by J I Rodale

At 1000+ pages, it's considered by many to be the composter's bible. It has lists of all kinds of things that can be composted and how to utilize them.

Can be found on amazon or ebay. Check both to get the best deal. There's many used copies on amazon right now for about 7 bucks including shipping.
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Location: Arkansas - Zone 7B/8A stoney, sandy loam soil pH 6.5
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Besides the bible Rodale wrote you can find lots of info within this forum, you can even start a topic and I know you will get good answers from many knowledgeable folks here, including me.

Cotton gin "trash" is great stuff, especially if you get the seeds as well as the junk stems and so on.
Slaughter houses might be regulated from giving you blood and other waste parts (USDA governs all Slaughter operations and most of the "refuse" has to be rendered and dyed)
Stables are a great place to get composting materials, the stall cleanings work very well in compost heaps.

For any off site (as in you can't really know what might be residuals on it) materials it is best to always use mushroom slurries during the building of the heap and once it is ready to start decaying.
One of the best types of mushroom to slurry for this type of use is oyster mushroom but all mushrooms work at breaking down most of the known contaminates.

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