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.
The Eustachian tube connects the ear to the throat, and it helps to drain fluid from the ear and into the throat where it can be swallowed, this helps to prevent the accumulation of fluid within the ear. After the treatment of many ear infections, fluid will remain in the middle ear for several days.