leonardite humic acid

1.we always a pre-production sample before mass production and final Inspection before shipment; 2.we can supply humid acids,amino acids,seaweed extract,biofertilizer,organic fertilizer 3.Committed to the research and development and international trade of special fertilizer products. 4. With a professional team and 20 years of experience in the field of plant nutrition, professional and timely international trade services.