Art Linsenmeyer's Homemade Powered Wheelbarrow might be just the thing for one with limited mobility who needs to transport small loads around the farmstead. At age 74 and with arthritic knees, the Wymore, NE, market gardener uses an old 32-inch riding lawn mower with a 6-cubic-foot wheelbarrow tub that he mounted on a tricycle-style frame and attached to the mower. Sitting on a seat atop the mower's 11 hp engine, he controls the speed with its hydrostatic rear-end. The wheelbarrow fits easily between his sweet corn rows and holds up to 10 dozen ears, which he takes to his vegetable stand and dumps by tilting the tub. (It's also used for many other hauling jobs around his place.)