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Tables on hatchery and flock participation in the national poultry improvement plan highlights for testing year 1974 75 item preview remove circle share or embed this item. Get this from a library tables on hatchery and flock participation in the national poultry improvement plan highlights for testing year 1976 77 united states agricultural research service northeastern region. Tables on hatchery and flock participation in the national poultry improvement plan highlights for testing year 1975 76 by united states agricultural research service. National poultry improvement plan and auxiliary provisions as of august 8 2014 18 14513 debarment from participation 19 14514 testing specific hatchery infected flock a flock in which an authorized laboratory has discovered one or more birds infected. The national poultry improvement plan npip also referred to as the plan is a cooperative federal state industry mechanism for controlling certain poultry diseases the plan consists of a variety of programs intended to prevent and control poultry diseases participation in all plan programs is voluntary but breeding flocks