North American Product Classification System (NAPCS) Canada 2017 Version 1.0
- 272 - Fertilizers, pesticides and other chemical products
- 27211 - Ammonia and chemical fertilizers
- 272112 - Organic and nitrogenous fertilizer materials
- 2721121 - Fertilizer materials of organic origin (including activated sewage sludge and processed tankage)
- 2721122 - Nitric acid, ammonia and ammonium compounds
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