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.
In some cases, the eardrum bursts, and pus drains out of the ear. In other cases, fluid remains in the middle ear, even after the infection has cleared up. Acute otitis media then turns into an ear problem known as otitis media with effusion * . The fluid buildup can last for weeks or months.