Drive slowly through the fields and keep looking around: last year I spotteda nice ‘wave’ in the field just when I came over a hill.  I almost missed itbecause the shape of the curve was only visible from one point.  I used a 200mm lens to compress the image.  Most of the time when I am photographingfarm areas; I am using wide angle lenses, tripod and aperture settings of F16 or 22 to get the maximum depth of field.