Final answer:
The provided historical references do not contain the specific year when the magazine's name changed from The National FUTURE FARMER to FFA New Horizons.
Step-by-step explanation:
The provided references discuss various historical farmer alliances and organizations emphasizing the agrarian movements of the late 19th century, particularly the Farmers' Alliance and the Grange. However, the specific question regarding the year in which the magazine's name changed from The National FUTURE FARMER to FFA New Horizons is not answered within these references. The naming history of this publication pertains to the Future Farmers of America (now known as the National FFA Organization), an American youth organization that promotes and supports agricultural education. The name change of their official magazine signifies the organization's efforts towards a broader, forward-looking agenda for its members. Unfortunately, without accurate reference material related to the Future Farmers of America and their publication's history, it is impossible to provide a definitive year for this event within the scope of this historical context.