THE 2-MINUTE RULE FOR CONTOUR SURVEY

By contour planting and contour ploughing, the speed of water runoff and therefore soil erosion might be substantially lowered; this is particularly important in riparian zones.An isohyet or isohyetal line (from Historic Greek ὑετός (huetos) 'rain') can be a line over a map becoming a member of points of equal rainfall inside a presented tim