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How to Join

Thank you for your interest in joining the Humic Products Trade Association (HPTA). To begin, please click the "Join Now" button to access the Membership Application Form.



Humic substances are versatile forms of natural organic matter used globally in agriculture, livestock feeds, pet foods, environmental applications and human health. The purpose of the Humic Products Trade Association (HPTA) is to advance the commercial uses of humic products through scientific and regulatory cooperation.

HPTA encourages scientists who support the advancement of humic products to join the association as well as industry leaders who desire to demonstrate their professional and ethical dedication to their clients. Members have access to education and training, networking opportunities, and as scientific literature database for improving their knowledge of humic substances.

Members play a key role in establishing HPTA standards, enabling the association to approach the regulatory communities for product approval.  A standardized analysis is the basis for supporting product quality claims and approval from State and Federal Regulators. Through the cooperation of the International Humic Substances Society (IHSS), the Association of American Plant Food Control Officials (AAPFCO), and the International Organization for Standardization (ISO), HPTA has established a standardized method for analyzing humic acids and the hydrophobic fraction of fulvic acids.