Final answer:
The specific date when the first National Star in Agribusiness was awarded is not mentioned in the historical references provided, which focus on the early efforts of the National Grange and a notable Congressional ceremony in 2007.
Step-by-step explanation:
The first National Star in Agribusiness has not been explicitly noted in the historical references provided, which include a promotional poster from the Grangers in 1873 and a Congressional Gold Medal Ceremony with President George W.
Bush in 2007. The National Grange of the Order of Patrons of Husbandry, known as the Grange, was founded in 1867 to support agricultural communities. The promotional poster from 1873 illustrates the benefits of being a Grange member such as cooperation amongst neighbors and a bountiful harvest.
However, the actual establishment of an award called the 'National Star in Agribusiness' is not mentioned in these materials and could require further research into specific agricultural award histories. The instances provided are key moments in agricultural history but do not directly answer the question about the National Star in Agribusiness award.