Farmers blocked more traffic arteries across Belgium on Wednesday as they sought to disrupt trade at major ports in a continued push for concessions to get better prices for their produce and less bureaucracy to do their work. The rallies, now in their fourth day and part of farming protests across the European Union, have seen only a few hundred tractors snarl traffic across the nation of 11.5 million. Hundreds of thousands of Belgians have been facing disruptions and struggling to get to work, or saw their doctor’s appointments cancelled because of the protests.