If you use a wheel loader to scrape feedyard pens, you can save energy by breaking up the manure pack with a chisel plow before scraping. Texas A&M University research shows that using a wheel loader withour surface preparation requires 1.56 horespower-hours per ton. Preparing the surface with a chisel plow requires 0.33 horsepower-hours per ton but reduces total energy consumption to 1.17 horsepower-hours per ton.