Still rarely use coal-based fertilizer, you need to know that coal is not just fuel. The combustible sedimentary rocks can also be used as fertilizer for plants. Coal fertilizer is proven to improve land quality while increasing rice production and other commodities. Coal fertilizer is suitable for use by farmers in areas that have barren and arid soils. Because, with carbon content and other elements, this coal fertilizer has the ability to improve soil structure.
http://www.sejukmenyejukan.com/2020/02/Coal-fertilizer-to-increase-agricultural-production-and-fertilize-the-soil.html?m=1
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