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.
Usually, although not always, the fluid in the middle ear contains some bacteria, but symptoms of an active infection (such as redness, pain, and pus) are rare. People usually notice a fullness in the affected ear and may hear a popping or crackling sound when they swallow. Some hearing loss commonly develops.