Antique Farm Equipment The McCormick Reaper was designed to harvest crops like wheat and barley. True False None The steel plow was invented to replace wooden plows that couldn’t handle rocky soil. True False None Threshing machines were primarily used for separating grain from straw. True False None Hand-crank corn shellers were used to grind corn into flour. True False None Early hay rakes were powered by steam engines. True False None Time's up Most Popular Most Popular