Ridge Shape as Influenced by Ridge Building Technique

Ridge height, ridge surface index (ratio of row width to ridge surface width), ridge cross-sectional area, and ridge form were measured to evaluate ridges formed during cultivation. Ridges were constructed with three tool types (disk, shovel, and sweep), operated at three speeds [5, 7, and 9 km/h (3, 5, and 7 mph)] and at three depths [5, 10, and 15 cm (2, 4, and 6 in.)]. Ridge forms were classified as convex, triangular, and concave-convex. Tool operating depth was the most important factor affecting ridge characteristics. Tool type affected cross-sectional area and ridge form, but had no effect on ridge height or ridge surface index.