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.
Middle ear effusion: Fluid behind the ear drum can occur with or without infection. Causes include colds, sinusitis, Eustachian tube dysfunction, allergies to name a few. Generally first line treatment include use of oral and nasal decongestants and active inflation of ears. If this does not help some patients may need to have tubes placed.