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 Meniereâs disease changes the volume of fluid in your ear, causing balance problems, hearing loss, and ringing in your ears. Its cause is unknown.  Head injury, strenuous physical activity, ear infections, and atmospheric pressure changes can cause inner ear fluid to leak into your middle ear.