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        Alibaba.com offers 9,584 leonardite humic acid products. About 88% of these are organic fertilizer, 6% are potassium fertilizer, and 1% are organic acid. A wide variety of leonardite humic acid options are available to you, such as slow, controlled, and quick. You can also choose from powder, granular. As well as from free samples, paid samples. There are 9,584 leonardite humic acid suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of leonardite humic acid respectively. Leonardite humic acid products are most popular in South America, South Asia, and Southeast Asia. You can ensure product safety by selecting from certified suppliers, including 967 with ISO9001, 148 with ISO14001, and 38 with Other certification.
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