Great in the Field. The primary uses of the Gates Magnum Heavy Harrow are for heavy residue management, fertilizer and chemical incorporation, and spring seedbed preparation. Saves Time and Fuel. With the Gates Magnum Heavy Harrow, you can run at high speed (8-12 mph) covering large areas in less time. With today’s high fuel prices, it can give you fuel savings of 50 to 75 percent over conventional implements. A Winning Combination! The option of 5/8″ x 30″, 9/16” x 26”, or 1/2″x22″ tines, unsurpassed section down-pressure, a heavy tubing frame and precise, hydraulic controlled tine angle adjustments make the Gates Magnum an ideal machine for all types of farming practices. If you want productivity up to 100 acres an