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Foundations of Crop Production
Series sponsored by Like the soil beneath us forms the foundation for a healthy growing plant, so do crop management practices determine the success or failings of your farm. Join […]
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Why do you allow but discourage vinyl? And EPDM?
We are aware of concerns about off gassing and leaching, but there isn’t conclusive scientific evidence that would justify prohibiting them. These materials may be prohibited in the future, pending […]
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Why is recycled plastic not allowed?
Recycled plastics present an increased rate of degradation and risk of leaching compared to virgin plastic, and additional risks posed by chemicals that may be added to plastics shipped overseas […]
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Do you allow the use of IBC totes?
In response to public comments, we made some changes to the draft standards. It is prohibited for IBC totes to be brought into an already CNG-certified operation. However, recognizing that […]
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Do you allow soil, compost, or vermicompost in aquaponics systems?
In response to public comments, we updated the standards to allow for soil, compost, and vermicompost to be used in dead-end or non-recirculating sections of the system. These materials are […]
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What pH adjustment products are allowed?
Minimally processed forms of calcium carbonate are allowed such as dolomitic lime and oyster shell flour. However, most pH buffering materials are synthetic, and at this time most producers consider […]
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Are compressed grow plugs or rock wool allowed?
They are allowed as long as they don’t contain synthetic fertilizers. These are products where fibers (peat or coir in the case of most grow plugs, and mineral fibers in […]