- Dairy Herd Improvement Association (DHIA) : A Dairy Herd Improvement Association (DHIA) is an organization with programs and objectives intended to improve the production and profitability of dairy farming. Aids farmers in keeping milk production and management records.

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Other /More definition:
A Dairy Herd Improvement Association (DHIA) is an organization with programs and objectives intended to improve the production and profitability of dairy farming. Aids farmers in keeping milk production and management records.