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April 20, 2015 02:00 AM

Michelin offers soil compaction reduction tips

Rubber & Plastics News Report
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    GREENVILLE, S.C.—Michelin Agriculture has offered some tips to help farmers reduce soil compaction as the 2015 growing season begins.

    Michelin said farmers are faced with lower commodity prices and are looking for any edge to improve productivity and crop performance. One of the most effective ways to improve yield is to minimize soil compaction by using tires that can operate at a lower air pressure.

    Additionally, farming equipment, including tractors, sprayers and combines, has grown larger and heavier in recent years, Michelin said, allowing farmers to cover more acres per day but also making soil compaction a much greater challenge.

    “Lower-pressure tires produce a larger tire footprint, which distributes the weight of the machine over the largest area possible to reduce compaction,” James Crouch, farm segment marketing manager for Michelin Agriculture tires, said in a statement.

    “In addition, a larger tire footprint provides excellent traction in the field, which can improve fuel economy by reducing slippage.”

    A Penn State University report explained that topsoil compaction is caused by high contact pressure. To reduce contact pressure, a load needs to be spread out over a larger area, which can be done by reducing inflation pressure.

    Harper Adams University in the United Kingdom recently completed a three-year study involving Michelin's Ultraflex IF (Increased Flexion) and VF (Very High Flexion) tires that demonstrated a yield increase of up to 4 percent compared to standard radial agriculture tires.

    “There's a lot more research planned, which we also hope to bring to the United States, to further demonstrate how lower-pressure tires can help farmers increase their yields and productivity,” Crouch said.

    Additional recommendations from Crouch and other experts include:

    • Check and maintain proper tire pressure as temperature changes throughout the growing season, particularly in the spring if new tires or equipment were purchased the previous fall or winter. Every increase of nine to 10 degrees in ambient air temperature can raise tire pressure by one psi, or lower it by that same amount as temperature decreases.

    • Reduce total axle load by operating the lightest possible equipment for each application that still efficiently transfers horsepower to the ground with minimal slippage. Ensure that total machine weight conforms to manufacturer specifications.

    • Minimize the number of trips over the field and reduce the area of the field on which equipment is operated. Limit heavy machinery to the same lanes through the field each season. Only the controlled traffic lanes become compacted, sparing soil between the lanes.

    • Use duals and large-diameter tires, since the larger surface area can help reduce tire pressure against the soil.

    • When additional machine weight is needed, use cast iron ballast instead of filling tires with liquid ballast. Liquid ballast changes the flexion of the tires, resulting in a smaller footprint.

    “Proper tire management and other practices can help reduce soil compaction, even though it can't be eliminated totally,” Crouch said. “Protecting the soil is one of the best investments farmers can make to improve their crop performance and their bottom lines.”

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