Answer:
Because two years gave the farmers more reasonable time to focus on their crops and travel to Washington. It was also more cost efficient to only make the trip every two years.
Edit: Also the fact that one year wasn't enough time to accomplish things in government as much as two years was but that wasn't a problem farmers in particular had, that was just a general argument that was made against one year terms
Explanation:
Hey there! I'm happy to help!
A primary source is one that is written by someone who experienced the event firsthand. Anne Frank's diary is an example of a primary source. She was the first (primary) person who experienced what happened on that hierarchy.
A secondary source is one that is written about a primary source. It comes second on the hierarchy of receiving historical information because it has to be based on a primary source, which gives the actual information. A history documentary is an example of a secondary source.
Have a wonderful day and keep on learning! :D