Contour plowing, Pennsylvania, 1938. Contour bunding, Catalonia, 2007. Contour ploughing or contour farming or Contour bunding is the farming practice of plowing and/or planting across a slope following its elevation contour lines.
1 recurring middle ear infections.  Fluid in the ear may be accompanied by signs and symptoms of allergies or an upper respiratory infection including congestion, runny nose, post nasal drip, or watery eyes.
1 Allow fluid to flow out of the middle ear through the tube into the ear canal. 2  Clear the fluid from the middle ear and restore hearing. 3  Prevent future buildup of fluid in the middle ear while they are in place. 4  Decrease the feeling of pressure in the ears, which reduces pain.